Australian Open men's doubles champion Nick Kyrgios is proving to be a winner on and off the court.
The Australian tennis star won Saturday night's final with Thanasi Kokkinakis against locals Matthew Ebden and Max Purcell in Melbourne.
Nick, 26, was captured on camera greeting Costeen, 21, with an on-court kiss after his win, which he followed up with a social media post.
'And lastly to my beautiful girlfriend who looks after me, I love you,' the post read.
He also thanked 'my bro Kokki', noting that Grand Slam champs has a nice ring to it.
'To my team, I CANNOT thank you enough, all the UPS & DOWNS we kept getting up,' he wrote.
Costeen has been by Nick's side during the Australian Open.
The temperamental tennis star debuted his relationship with Costeen, a Syedne-based blogger who holds a bachelor in psychological science and owns an interiors business, in December.
Like Nick -- who has a Greek dad and a Malay mom -- Costeen too seems to have Greek origins. Melbourne, by the way, has the most Greeks after Athens!
Nick's last relationship with Chiara Passari didn't end well. Chiara accused him of cheating on her and there were also allegations of assault. Hope things go better with Costeen.
Nadal fends off injuries for a place in tennis history
Nadal triumph slams door on young pretenders again
What a super week for Australia's 'Special Ks'!
Barty ends 44-year wait for home champion at Aus Open
Good morning, folks! Here comes the G.O.A.T!