Kyrgios was all smiling on Wednesday as he celebrated his 27th birthday, sharing a romantic photo on Instagram of himself celebrating with Greek Australian beauty Hatzi, 21 while implying the pair were secretly engaged.
Kyrgios, who has been dating university graduate Hatzi since December, raised eyebrows when he re-posted a photo of the couple cuddling on the tennis court, alongside a padlock emoji and diamond ring emoji.
Hatzi shared a birthday tribute to her boyfriend on Instagram, uploading a gallery of throwback snaps documenting their four-month relationship.
'Happy birthday to the most incredible human I have ever met. I am so lucky to have you and forever grateful for everything you have done for me. Your selflessness and care is unmatched,' she wrote in the caption.
Hinting at wedding plans, Hatzi added: 'I can't wait to do life with you and travel the world together, I love you today and forever, my squish.'
