Nick Kyrgios spoils his girlfriend Costeen Hatzi with $15,900 Cartier bracelet

Nick Kyrgios' girlfriend Costeen Hatzi looks uninterested as she watches a basketball game

Tennis bad boy Nick Kyrgios shares a series of loved-up images with new girlfriend Costeen Hatzi

Nick Kyrgios and Thanasi Kokkinakis celebrate their Australian Open win at Totti's Bondi