Tennis bad boy Nick Kyrgios treats new girlfriend Costeen Hatzi to a fancy meal at Nobu in Melbourne during a break from the Australian Open By Chloe-lee Longhetti For Daily Mail Australia Published: 22:57 GMT, 17 January 2022 | Updated: 22:58 GMT, 17 January 2022 Viewcomments They've been flaunting their new romance on social media ever since going public last month. And on Monday, tennis bad boy Nick Kyrgios, 26, treated his new girlfriend Costeen Hatzi to a fancy meal at Melbourne's Nobu during a break from the Australian Open. Nick reposted a picture of their fancy meal on his Instagram stories, captioning his post: 'Only the best for my mini'. Date night! Tennis bad boy Nick Kyrgios treated new girlfriend Costeen Hatzi to a fancy meal at Nobu in Melbourne on Monday, during a break from the Australian Open While out, the pair dined on food including oysters. Nick was supported by model Costeen, 21, earlier this week as he worked up a sweat on the practice court at the Australian Open at Melbourne Park. On Monday, the pair were seen sharing a kiss courtside. Smitten: Nick reposted a picture of their fancy meal on his Instagram stories, captioning his post: 'Only the best for my mini' The Australian tennis bad boy has been sharing a steady string of loved-up posts with Costeen since they debuted their romance last month. Posting to Instagram Stories on Monday, the athlete uploaded a loved-up selfie alongside his ladylove as they strolled down the street together, adding the caption: 'We click [lightning emoji, puzzle piece emoji]'. 'I got no doubts [love heart-eyes emoji]', he added, making sure to tag Costeen's Instagram account. The post comes as Nick continues to shower Costeen with courtside kisses, designer gifts and red roses. Loved up: The Australian tennis bad boy has been sharing a steady string of loved-up posts with Costeen since they debuted their romance last month. Just last week, the smitten tennis pro treated Costeen to a $3,450 Louis Vuitton handbag Just last week, the smitten tennis pro treated Costeen to a $3,450 Louis Vuitton handbag. Costeen shared photos of the designer garb to her Instagram Stories, tagging her famous beau and noting she was 'one lucky girl'. Nick went Instagram official with Costeen last month, sharing a photo of the couple cuddled up together. Nick also shared more photos on his Instagram Stories of the pair looking loved-up while on their way to a luxurious hotel suite. He wrote in the caption: 'I'm blessed.' 'This is to the New Year and a chance for all of us to get it right,' he added, hinting at his tumultuous split from ex Chiara Passari, which made headlines last year. Case of the ex: Nick is pictured with his former flame Chiara Passari Share or comment on this article: All rights reserved for this news site (dailymail) and under his responsibility