Three's company! Kendall Jenner hams it up as she plays gooseberry to BFF Gigi Hadid and her beau Joe Jonas at US Open

She's might be single, but that didn't stop Kendall Jenner from being the life of the party on Tuesday.

The 19-year-old model was seen playing gooseberry to BFF Gigi Hadid, 20, and her boyfriend Joe Jonas, 26, as they attended the 2015 US Open at USTA Billie Jean King National Tennis Center in the Flushing neighbourhood of Queens, New York City.

And the Keeping Up With The Kardashians star ensured sure she wasn't ignored.

Gooseberry: Kendall Jenner, right, joined Gigi Hadid, middle, and her beau Joe Jonas, left, at the 2015 US Open at USTA Billie Jean King National Tennis Center in the Flushing neighborhood of Queens, New York City on Tuesday

Gooseberry: Kendall Jenner, right, joined Gigi Hadid, middle, and her beau Joe Jonas, left, at the 2015 US Open at USTA Billie Jean King National Tennis Center in the Flushing neighborhood of Queens, New York City on Tuesday

Besties: The models were spotted with big smiles as they cosied up in the stands

Besties: The models were spotted with big smiles as they cosied up in the stands

After sharing a moment with her giddy gal pal, the TV personality happily chatted it up with the blonde beauty's beau.

Kendall dressed to impress, baring her taut tummy in a fuzzy cream crop top and complementary white high-waisted, soft A-line skirt.

Meanwhile, Sports Illustrated Swimsuit Issue stunner Gigi appeared Western chic in a fringed denim blouse which she layered with a patterned red neckerchief and teamed with skinny jeans. 

Tense: The girls were into the game

Tense: The girls were into the game

Proper: Kendall was spotted crossing her legs, as Gigi held her hands together

Proper: Kendall was spotted crossing her legs, as Gigi held her hands together

Joe was clad in a screen-printed T-shirt and jeans, as the trio watched the Williams sisters match on Day 9 of the tennis tournament.

Gigi and her man, who have been inseparable since they got together in May, shortly after the model split from long-term love Cody Simpson, recently returned from a romantic holiday.

The couple were thought to have been vacationing in Bora Bora, with both the model and DJ sharing photos of their stunning holiday views.

Mischievous: Kendall had a cheeky look on her face as she and Gigi shared a joke 

Mischievous: Kendall had a cheeky look on her face as she and Gigi shared a joke 

Secrets: Kendall ensured she got her fair share of Gigi's attention

Secrets: Kendall ensured she got her fair share of Gigi's attention

Three's a crowd: Joe didn't want in on Kedall's funny gossip 

Three's a crowd: Joe didn't want in on Kedall's funny gossip 

Top of the crops: Kendall showed off her taut tummy in a cream midriff-baring blouse

Top of the crops: Kendall showed off her taut tummy in a cream midriff-baring blouse

Needy: Kendall knows how to get what she wants

Cuddles: Gigi stepped up to the plate when Kendall was feeling cold

Powwow:  The group seemed deep in conversation during a break 

Powwow:  The group seemed deep in conversation during a break 

Bonding: The girls had a giggle as they watched the match

Cheeky! They hammed it up as they shared a joke

Cheeky! They hammed it up as they shared a joke

Feeling left out? Joe was seen looking to the side as the girls bonded 

Feeling left out? Joe was seen looking to the side as the girls bonded 

'My pre-fashion month vacay...missing this view already!' Gigi captioned one snap as the pair headed home.

On Tuesday, Venus Williams of the US played her younger sister, Serena Williams of the US, during the quarterfinals of the 2015 US Open Tennis Championship.

Kendall's expecting sister Kim Kardashian, 34, was also spotted in the stands. 

Western chic: Gigi wore a denim-on-denim ensemble with pops of red 

Western chic: Gigi wore a denim-on-denim ensemble with pops of red 

Look of love: Gigi and Joe shared a smooch

Look of love: Gigi and Joe shared a smooch

Gooseberry: Kendall looked the other way

Gooseberry: Kendall looked the other way

Peace: Kendall was totally fine with her best friend hanging out with her boyfriend 

Peace: Kendall was totally fine with her best friend hanging out with her boyfriend 

Big match: The famous friends were there to see Serena Williams play against her sister Venus Williams. Serena defeated Venus 

Big match: The famous friends were there to see Serena Williams play against her sister Venus Williams. Serena defeated Venus 

No doubt Kim was there to cheer on her pal Serena, as they were seen having tea together in The Big Apple the previous night.

Meanwhile, it is set to be a busy few weeks for Gigi and Kendall, with New York Fashion Week kicking off on Wednesday.

The models have both become firm favourites with some of fashion's biggest names such as Tom Ford and Marc Jacobs.  

Prime location: The group appeared to be in a great spot for snapping shots

Prime location: The group appeared to be in a great spot for snapping shots

Round of applause: They were clearly impressed with the standard of play

Round of applause: They were clearly impressed with the standard of play

Is it over? However Joe seemed keen to leave looking at the ceiling

Is it over? However Joe seemed keen to leave looking at the ceiling

Kendall has been busy recently splitting her time between spending time with family and completing modelling jobs in  LA.

She was also recently seen partying with Justin Bieber in the Big Apple.

The pair have been linked previously. 

Looking cool: Gigi seemed to be waiting for her car 

Looking cool: Gigi seemed to be waiting for her car 

Tagging along: Kendall's sister Kim Kardashian was also seen at the tournament

Tagging along: Kendall's sister Kim Kardashian was also seen at the tournament

Let's go! Kendall and Gigi weren't shy about showing their spirit

Let's go! Kendall and Gigi weren't shy about showing their spirit

She only recently returned from a family break with the rest of the Kardashian clan in St Barts.

Kendall was there with Kim, Kourtney, Khloe, and Kylie as well as their mother Kris.

It is not known how long Kendall plans to spend in the Big Apple before she returns to her native Los Angeles. 

There we go! Joe ended up joining in on the cheer 

There we go! Joe ended up joining in on the cheer 

Can't get enough of each other: Gigi and Joe have been inseparable since they began dating in spring

Can't get enough of each other: Gigi and Joe have been inseparable since they began dating in spring

It's a waiting game: Gigi and Joe were happy to support Kim's close friend Serena at the tennis match 

It's a waiting game: Gigi and Joe were happy to support Kim's close friend Serena at the tennis match 

Sister act: Kim was spotted by her sister's side for some of the game

Sister act: Kim was spotted by her sister's side for some of the game

Matching: Both opted to sport white garments in their ensembles 

Matching: Both opted to sport white garments in their ensembles 

Also in attendance: Donald Trump was greeted by John McEnroe in the audience

Also in attendance: Donald Trump was greeted by John McEnroe in the audience

Firm hand shake: Trump seemed to pay respect to the former tennis star

Firm hand shake: Trump seemed to pay respect to the former tennis star

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