Demba Ba scored twice on his Chelsea debut as the FA Cup holders came from behind against Southampton to ease into the fourth round at St Mary's Stadium.

Jay Rodriguez put the Saints ahead after good work by Jason Puncheon before Ba touched Juan Mata's goalbound attempt home.

Victor Moses made it 2-1 and Branislav Ivanovic headed his team's third goal.

Ba added the fourth after Eden Hazard's pass before Frank Lampard scored from the spot.

Lampard's 83rd-minute penalty means he is now Chelsea's joint second-highest goal-scorer alongside Kerry Dixon, with 193 goals for the Blues.

Chelsea, four times winners in the past six seasons, are clearly in no mood to hand over the cup they won by beating Liverpool 2-1 in last May's final.

High five for Chelsea

Chelsea have scored five goals in three of their last four FA Cup ties - against Southampton, Tottenham in last season's semi-final and Leicester City in the sixth round

Rafael Benitez made five changes to the side that started the surprise 1-0 home defeat to Queens Park Rangers on Wednesday and the visitors were forced to weather one or two uncomfortable moments before taking command at St Mary's Stadium.

But the London club, who entertain Swansea City in the League Cup semi-final first leg on 9 January, remain on course for a cup double after recovering from a poor start.

All eyes were on Ba, the £7m signing from Newcastle United.

And the scorer of 29 goals in 54 Premier League appearances for the Magpies quickly endeared himself to Chelsea's 4,592 travelling supporters with a committed performance.

This was only the Senegal international's second appearance in the competition - his previous FA Cup outing coming in a West Ham United shirt in February 2011.

He failed to find the net as the Hammers overcame Burnley 5-1 in the fifth round two years ago, but Ba had no such problems against Southampton, who are now left to focus on avoiding relegation from the Premier League.

The Saints, who had failed to progress past the third round only once in the previous 10 attempts, had taken a 22nd-minute lead when former Burnley striker Rodriguez finished with the outside of his right foot following a fine pass by Jason Puncheon.

But any hopes of a shock vanished when Chelsea scored twice in 10 minutes before half-time to turn the tie upside down.

Ba, who teased and tormented the home side's defence throughout, equalised when he got the last touch on the line to Mata's goalbound attempt.

Suddenly the European champions were revitalised.

Moses made it 2-1 on the stroke of half-time with a left-foot half-volley from a cross by Ashley Cole, chasing the eighth FA Cup winners medal of his career.

The second half was one-way traffic, Ivanovic making it 3-1 in the 52nd minute with a powerful header from Mata's left-wing cross before Ba wrapped up a highly satisfactory debut with Chelsea's fourth goal after flicking home Eden Hazard's ball.

It was left to substitute Lampard to wrap up an impressive Chelsea win when he scored from the penalty spot after Steven Davis was adjudged to have handled.

Southampton manager Nigel Adkins:

"We started the game brightly, scored a very good goal from Jay Rodriguez. It was a good game to watch from our point of view in the first half.

"There was some good football played and the big killer blow came for us on the stroke of half-time with the goal they've gone and scored.

"It is fair to say in the second half, Chelsea demonstrated the good players they've got in the team and to give them credit I thought they were very good and took it away from us."

Chelsea interim manager Rafael Benitez:

"Demba Ba was really good in terms of everything he did. It was nearly perfect.

"It is important for us to have another option and he has been great today. I can decide now whether to play one or the other or both."

On Lampard becoming second-highest goal-scorer alongside Kerry Dixon: "It's a great achievement for him and hopefully he can score a lot of goals until the end of the season.

"We will be happy and he will be happy if that happens."

Lineup, Bookings (2) & Substitutions (6)

Southampton

  • 31 Boruc
  • 03 Yoshida
  • 06 Fonte (Hooiveld - 63' )
  • 23 Shaw
  • 04 Schneiderlin (De Ridder - 54' Booked )
  • 08 S Davis
  • 16 Ward-Prowse Booked
  • 18 Cork
  • 21 Guly
  • 42 Puncheon (Lee - 78' )
  • 09 Rodriguez

Substitutes

  • 01 K Davis
  • 05 Hooiveld
  • 29 Reeves
  • 33 De Ridder
  • 07 Lambert
  • 19 Lee
  • 24 Mayuka

Chelsea

  • 22 Turnbull
  • 02 Ivanovic (Lampard - 65' )
  • 03 Cole
  • 04 Luiz
  • 24 Cahill
  • 28 Azpilicueta
  • 07 Ramires
  • 10 Mata (Oscar - 79' )
  • 13 Moses (Marin - 73' )
  • 17 Hazard
  • 29 Ba

Substitutes

  • 40 Hilario
  • 19 Ferreira
  • 34 Bertrand
  • 08 Lampard
  • 11 Oscar
  • 21 Marin
  • 09 Torres
Ref: Dean
Att: 27,813

Match Stats

Shots

7 15

On target

5 12

Corners

4 8

Fouls

7 9

Live Text Commentary

90:00 +4:01 Full time

Full Time The referee signals the end of the game.

90:00 +0:12

Effort from the edge of the area by Jos Hooiveld goes wide of the left-hand upright.

89:28

Marko Marin challenges Jack Cork unfairly and gives away a free kick. Free kick crossed right-footed by Guly Do Prado from right wing, Demba Ba makes a clearance.

88:02

Frank Lampard takes the free kick.

88:02 Booking

Booking Booking for James Ward-Prowse.

87:58

James Ward-Prowse challenges Emboaba Oscar unfairly and gives away a free kick.

86:37

Outswinging corner taken right-footed by Emboaba Oscar from the right by-line, David Luiz takes a shot. Save by Artur Boruc.

85:23

Jack Cork sends in a cross, clearance by Gary Cahill.

84:42

Marko Marin sends in a cross, Artur Boruc makes a save.

82:08 Goal scored

Goal! - Frank Lampard - Southamp'n 1 - 5 Chelsea Frank Lampard scores a power penalty. Southampton 1-5 Chelsea.

81:36

Steven Davis is penalised for a handball.

79:09

Free kick awarded for an unfair challenge on Maya Yoshida by Gary Cahill. Direct free kick taken by Artur Boruc.

77:51

Direct free kick taken by Emboaba Oscar.

77:51 Substitution

Substitution Emboaba Oscar on for Juan Mata.

77:51 Booking

Booking Booking for Steve De Ridder for unsporting behaviour.

76:41

Eden Hazard fouled by Steve De Ridder, the ref awards a free kick.

76:41 Substitution

Substitution Jason Puncheon leaves the field to be replaced by Tadanari Lee.

76:41

The ball is crossed by Guly Do Prado, Steve De Ridder has a headed effort at goal from deep inside the area missing to the right of the goal.

76:08

The ball is crossed by Jack Cork, clearance by Cesar Azpilicueta. Corner taken right-footed by Guly Do Prado from the left by-line, save by Ross Turnbull.

75:44

A cross is delivered by Guly Do Prado, clearance made by Gary Cahill.

75:00

Free kick awarded for a foul by Marko Marin on Jason Puncheon. Jason Puncheon restarts play with the free kick.

73:26

Frank Lampard takes a shot. Save made by Artur Boruc.

70:26 Substitution

Substitution Marko Marin comes on in place of Victor Moses.

70:26

Guly Do Prado crosses the ball, Steve De Ridder takes a shot. Save made by Ross Turnbull. Steven Davis takes a shot. Save by Ross Turnbull. Inswinging corner taken from the right by-line by Jason Puncheon, clearance made by Demba Ba. The ball is sent over by Victor Moses, Demba Ba takes a shot. Save by Artur Boruc. Steve De Ridder concedes a free kick for a foul on Gary Cahill. Free kick taken by Gary Cahill.

69:11

Free kick awarded for a foul by Jason Puncheon on Ashley Cole. David Luiz takes the direct free kick.

68:54

Jason Puncheon fouled by Ashley Cole, the ref awards a free kick. Jason Puncheon takes the free kick.

66:50

Cesar Azpilicueta delivers the ball.

64:18

Nascimento Ramires takes the free kick.

64:18 Substitution

Substitution Frank Lampard comes on in place of Branislav Ivanovic.

64:18

Steve De Ridder is penalised for a handball.

62:56 Substitution

Substitution Jos Hooiveld comes on in place of Jose Fonte.

60:44

Assist on the goal came from Eden Hazard.

60:44 Goal scored

Goal! - Demba Ba - Southamp'n 1 - 4 Chelsea Demba Ba finds the net with a goal from inside the six-yard box to the bottom right corner of the goal. Southampton 1-4 Chelsea.

60:10

David Luiz takes a shot. Save by Artur Boruc.

59:36

Foul by Guly Do Prado on Eden Hazard, free kick awarded. Juan Mata takes the direct free kick.

56:38

Free kick awarded for an unfair challenge on Luke Shaw by Nascimento Ramires. Direct free kick taken by Luke Shaw.

55:34

Luke Shaw concedes a free kick for a foul on Juan Mata. Cesar Azpilicueta takes the direct free kick.

53:48 Substitution

Substitution Steve De Ridder on for Morgan Schneiderlin.

52:43

The ball is sent over by Jason Puncheon, blocked by Ashley Cole.

51:02

Assist on the goal came from Juan Mata.

51:02 Goal scored

Goal! - Branislav Ivanovic - Southamp'n 1 - 3 Chelsea Branislav Ivanovic grabs a headed goal from close range. Southampton 1-3 Chelsea.

50:14

Juan Mata takes a shot. Blocked by Guly Do Prado. Corner taken by Eden Hazard from the left by-line, Guly Do Prado manages to make a clearance.

48:52

Gary Cahill gives away a free kick for an unfair challenge on Jay Rodriguez. Luke Shaw restarts play with the free kick.

45:01

The second half has started.

45:00 +2:10 Half time

Half Time The players leave the pitch at half time.

45:00 +1:22

Ashley Cole provided the assist for the goal.

45:00 +1:22 Goal scored

Goal! - Victor Moses - Southamp'n 1 - 2 Chelsea Victor Moses finds the net with a goal from just inside the area to the bottom right corner of the goal. Southampton 1-2 Chelsea.

45:00 +0:38

Cesar Azpilicueta produces a cross, Demba Ba produces a left-footed shot from the edge of the box and misses to the left of the target.

44:12

Outswinging corner taken by Juan Mata from the left by-line played to the near post, clearance by Guly Do Prado.

43:13

Victor Moses crosses the ball, Luke Shaw manages to make a clearance. The offside flag is raised against Jay Rodriguez. Free kick taken by Gary Cahill.

42:02

Cesar Azpilicueta sends in a cross.

41:02

Free kick awarded for an unfair challenge on Jay Rodriguez by Branislav Ivanovic. Direct free kick taken by Jose Fonte.

40:06

Maya Yoshida gives away a free kick for an unfair challenge on Demba Ba. Free kick taken by Gary Cahill.

39:44

Guly Do Prado takes a shot. Ross Turnbull makes a save.

39:21

Cesar Azpilicueta takes a shot. Save by Artur Boruc.

38:30

Victor Moses takes a shot. Artur Boruc makes a save. Eden Hazard takes the inswinging corner, Steven Davis manages to make a clearance.

34:48

Juan Mata provided the assist for the goal.

34:48 Goal scored

Goal! - Demba Ba - Southamp'n 1 - 1 Chelsea Demba Ba gets on the score sheet with a goal from inside the six-yard box to the bottom right corner of the goal. Southampton 1-1 Chelsea.

30:37

Eden Hazard decides to take the corner short.

28:11

Corner from the right by-line taken by Juan Mata, save by Artur Boruc. Inswinging corner taken left-footed by Juan Mata, save by Artur Boruc.

26:36

Inswinging corner taken from the left by-line by Guly Do Prado. James Ward-Prowse takes a shot. David Luiz gets a block in.

25:52

Eden Hazard has shot on goal from just outside the penalty box which goes wide of the right-hand upright.

25:36

Demba Ba crosses the ball.

23:18

Demba Ba challenges Maya Yoshida unfairly and gives away a free kick. Jose Fonte takes the direct free kick.

21:07

The assist for the goal came from Jason Puncheon.

21:07 Goal scored

Goal! - Jay Rodriguez - Southamp'n 1 - 0 Chelsea Jay Rodriguez finds the back of the net with a goal from just inside the area to the bottom right corner of the goal. Southampton 1-0 Chelsea.

19:34

Demba Ba is caught offside. Indirect free kick taken by Jose Fonte.

17:33

The ball is sent over by Jack Cork, clearance made by Branislav Ivanovic.

15:59

The assistant referee flags for offside against Jay Rodriguez. Indirect free kick taken by Ross Turnbull.

14:40

Guly Do Prado takes a inswinging corner to the near post, Demba Ba makes a clearance.

12:21

David Luiz takes a shot. Save by Artur Boruc.

11:20

The assistant referee signals for offside against Juan Mata. Free kick taken by Jack Cork.

10:56

Jay Rodriguez is caught offside. Branislav Ivanovic takes the free kick.

10:15

David Luiz concedes a free kick for a foul on James Ward-Prowse. Direct free kick taken by Jose Fonte.

6:57

Effort on goal by David Luiz from just outside the area goes harmlessly over the target.

6:22

Inswinging corner taken left-footed by Juan Mata from the left by-line to the near post.

4:05

The ball is delivered by Jack Cork, Branislav Ivanovic manages to make a clearance. Guly Do Prado is ruled offside. Indirect free kick taken by Ross Turnbull.

0:00

The referee gets the game started.

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