Jannik Sinner has addressed speculation about the eye-catching ring his girlfriend, Laila Hasanovic, recently flaunted on social media. The couple has been in the spotlight since the World No. 2 officially confirmed his relationship with the Danish model during his victory speech at the Vienna Open.Sinner also enjoyed his girlfriend's support from the stands during his campaign at the ATP Finals in Turin. Hasanovic cheered the Italian on as he claimed a 7-6(4), 7-5 win over Carlos Alcaraz in the final and successfully defended his title at the year-end championships.Laila Hasanovic's presence in Jannik Sinner's player's box generated a lot of excitement among fans, especially after she was spotted with a dazzling ring on her middle finger. The Danish model further fueled rumors about a potential engagement when she shared a close-up of the ring on Instagram.Laila Hasanovic's Instagram storyHowever, Sinner has put all the rumors to rest. When asked about Hasanovic's ring by a reporter after his ATP Finals win, the World No. 2 firmly stated that it wasn't a gift from him."The ring Laila showed on social media? Did I have a hand in it? No, no," Sinner said via Express.In addition to addressing speculation about his relationship with his girlfriend Laila Hasanovic, Jannik Sinner also opened up about his friendships with other tennis stars. The Italian shed light on his fascinating dynamic with Carlos Alcaraz and also revealed his closest friends on tour.Jannik Sinner's girlfriend Laila Hasanovic joined in the celebrations after his ATP Finals winSinner with his girlfriend Laila Hasanovic and coaching team - Source: GettyAfter beating Carlos Alcaraz in the ATP Finals final, Jannik Sinner rushed to celebrate his victory with his team and family in Turin. The Italian also shared a warm hug with his girlfriend, Laila Hasanovic, on the sidelines.Sinner hugged Hasanovic after his victory - Source: GettyHasanovic and her pet dog Snoopy later joined Sinner, his brother Mark and his coaching team for celebratory photos with the coveted trophy. Meanwhile, Sinner's parents were notably absent after the World No. 2 had cheekily teased them for having "more important" things to do at home.On the tennis front, Jannik Sinner ended his remarkable 2025 season with two Grand Slam titles, one Masters 1000 trophy, and the ATP Finals title to his name. The Italian also topped the leaderboard for most prize money on tour after raking in $19,114,396.