Cesc Fabregas and Jose Mourinho have to put bad blood behind them... Chelsea's £30m star was once seemingly KICKED by his new boss!

• Chelsea have signed former Arsenal captain Fabregas from Barcelona  
• Blues boss Mourinho and Fabregas have clashed in past
• First clash took place while Fabregas was still at Arsenal 
• Relationship worsened while midfielder played for Barca 
• Duo will now united in Premier League next season 

By Sami Mokbel for the Daily Mail Follow @@SamiMokbel81_DM

Published: 06:12 EST, 13 June 2014 | Updated: 21:13 EST, 15 June 2014

Jose Mourinho and Cesc Fabregas could yet turn out to be a match made in heaven following the Spaniard’s shock move £30million move to Chelsea. But the pair have not always seen eye-to-eye; far from it in fact.

From London to Catalonia, Fabregas and Mourinho have had their run-ins. Their apparent disdain for each other even appeared to turn physical in 2011.

Here, Sportsmail look at some of the incidents that’ll need brushing under the carpet in the coming months.

VIDEO Scroll down to watch Fabregas training with his new Chelsea team-mate Torres

Cesc Fabregas: Arsene Wenger said he didn't need me at Arsenal

Close your eyes, Arsenal fans: Cesc Fabregas poses with his new Chelsea shirt after signing for £30m

Torres and new Chelsea team-mate Fabregas prepare for Holland

February 2007

The bad-blood between Mourinho and Fabregas seemed to have started at the Millennium Stadium during the 2007 Carling Cup final between Chelsea and Arsenal.

Having watched John Terry take a brutal kick to the face which resulted in a hospital visit for the Blues captain, it seemed Fabregas was more interested in complaining to the referee about a piece of celery thrown onto the pitch when he was taking a corner.

Then, in the midst of an injury-time melee which saw Kolo Toure, Jon Obi Mikel and Emmanuel Adebayor sent off, the Spaniard grabbed hold of Frank Lampard around the neck, starting a long-running feud.

Even Mourinho ran onto the pitch to get involved.

Spark: Chelsea manager Jose Mourinho (third left) raced onto the pitch during an injury-time melee involving Fabregas (centre) during the Carling Cup final between Chelsea and Arsenal in February 2007

Long-running feud: Fabregas and Frank Lampard (centre left) have had a series of scrapes 

August 2011

Did Mourinho aim a kick at Fabregas in August 2011 during the Spanish Super Cup against Real Madrid? It looked that way.

Directly in front of the dugouts, the midfielder was scythed down by Marcelo sparking a mass brawl.

And TV replays of the incident appear to show the then Real Madrid boss aim a sly kick at Fabregas as he lie on the floor in pain.

He didn’t look to make much contact with the midfielder.

But he certainly made contact with with then Barca boss Tito Vilanova just moments later as Mourinho poked his opposite number in the eye. In the aftermath Mourinho branded Barca a ‘small team’.

Did Jose kick him? Barca players rush to confront Mourinho while Fabregas lies prostrate on the pitch

Not seeing eye-to-eye: Mourinho and Fabregas must now put their past grievances behind them at Chelsea

February 2014

You wonder what Fabregas made of Mourinho’s recent ‘specialist in failure’ comments in reference to Arsene Wenger.

Despite the fact Wenger rejected the opportunity to re-sign Fabregas this summer, the pair maintain a close relationship.

So how will the midfielder feel about playing for a manager who so incisively insulted a man he views as a father figure?

And then, of course, will come the first time Fabregas is asked about Mourinho’s jibe. Just how will he answer? Rock and hard place.

Mentor: Arsene Wenger (right) has been the biggest influence on Fabregas's career and they remain close

Best of enemies: Wenger and Mourinho have had a bitter rivalry ever since the Portuguese came to England

February 2014

Fabregas told Mourinho to ‘shut-up’ earlier this year after the Chelsea manager said Manchester City would be facing ‘the worst Barcelona for many, many years’ in the Champions League.

The Special One claimed City would have a chance of knocking Barca out of the Champions League because the Catalans are well below their peak.

Fabregas didn’t take too kindly to the comments and after the Spanish club won the first leg of their last-16 tie with City 2-0 at the Etihad Stadium he hit back at Mourinho.

‘Some people were talking a bit too much before the game and now they have to shut up for a few days,’ Fabregas said.

National duty: Fabregas (right) closes down Diego Costa (left) during training with Spain in Salvador

History: Fabregas will join his new club after the World Cup hoping to forget moments such as this in 2007

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