Nick Kyrgios' girlfriend Costeen Hatzi says her tennis star boyfriend won't retire

Nick Kyrgios is spotted looking glum as he arrives back in Sydney with his girlfriend Costeen Hatzi

Costeen Hatzi: 'Nick Kyrgios and I should have worn helmets on e-scooters'

Nick Kyrgios caught groping his girlfriend Costeen Hatzi's chest on camera at Australian Open