Beaming Kendall Jenner puts up a coy on display as she cheers on her basketballer boyfriend Blake Griffin at the LA Clippers game (Details, pics)

They reportedly made things official at the end of last month.

And Kendall Jenner certainly looked besotted as she sat court side at the Los Angeles Clippers versus Philadelphia 76ers basketball game at the Staples Center in LA on Monday night.

The model, 21, was seen cheering on her Clippers boyfriend Blake Griffin, 28, just a day after they were seen enjoying a lengthy date at Sugarfish in Beverly Hills on Sunday. Rocking understated chic, Kendall opted for a loose grey t-shirt and fitted skinny jeans, making the most of her model statistics as she supported her beau.

Injecting a touch of catwalk glamour to the game, she wore a pair of pointed textured ankle boots, wearing her shoulder length hair in a tousled bob.

Kendall beamed as she sat courtside, chatting happily to Blake's producer-director pal Michael Ratner, and boxing champion Flloyd Mayweather.

Just weeks ago it was reported Kendall and Blake have decided to move their relationship to the next level, stage onto 'something more serious'.

Kendall's appearance at the game comes after she was spotted on an array of dates with the basketball star. A source told Us Weekly: 'They're legit. They're a full-on couple.'

Kendall has been going to a lot of his games and they have been enjoying time at home when Blake is in town. They're good.

'The star's new relationship status comes just over a month since it was claimed she was enjoying 'playing the field.'

It was said she was both dabbling with with Blake while still talking to her rapper ex-boyfriend

A$AP Rocky, who she enjoyed a brief affair with last year.

An insider told People last month: 'Kendall and Blake have been hanging out quite a bit and are having a good time. They met in passing a few times and hit it off.

'She's still talking to Rocky as well. But he isn't the type to settle down or be a good boyfriend, so she's playing the field too. She's seeing Blake romantically. It's nothing serious. She has been in LA a lot lately, and is having fun.'