Nick Kyrgios Breaks His Silence on Split with Girlfriend Costeen Hatzi Nick Kyrgios has broken his silence on his split from ex-girlfriend Costeen Hatzi. The Australian tennis star, 30, asked his 4.1 million Instagram followers to “ask whatever” and to “not hold back” during an Instagram Q&A on Wednesday, June 11. When one fan asked Kyrgios if he will “ever …