Jannik Sinner's girlfriend Laila Hasanovic stepped out in style while embarking on her birthday trip with a special companion in the tennis star's absence. The Danish model and influencer caught the attention of Tommy Paul's fiancée Paige Lorenze with her fashionable snaps.Sinner is currently in Turin for the ATP Finals as he looks to successfully defend his title at the event and clinch the year-end World No. 1 ranking. Although the Italian enjoyed his girlfriend's support from the stands during his recent Vienna Open campaign, he may have to do without her presence at the year-end championships as Hasanovic jets off to celebrate her birthday.Laila Hasanovic revealed that she was heading to the mountains to ring in her 25th birthday and shared stylish pictures from the Copenhagen airport. The Danish model donned a cozy brown coat with fur lining to round out her chic winter outfit while being accompanied by her adorable pet dog."Birthday getaway to the mountains," Hasanovic captioned her Instagram post. View this post on Instagram Instagram PostTommy Paul's fiancée Paige Lorenze expressed her admiration for Hasanovic's "beautiful" look in the comments section."Beautiful," Lorenze commented.Paige Lorenze's comment on Laila Hasanovic's postLaila Hasanovic shared the snaps just hours after Jannik Sinner was ridiculed for being the "worst boyfriend" as fans took issue with his "awkward" love confession during a Q&A at the Paris Masters.Jannik Sinner made his relationship with girlfriend Laila Hasanovic public after Vienna Open winJannik Sinner - Source: GettyRumors about Jannik Sinner and Laila Hasanovic's relationship had circulated for months before an official confirmation, with speculation ramping up after fans noticed that the four-time Grand Slam champion had a photo of Hasanovic as his phone wallpaper at the US Open. However, Sinner only confirmed his relationship with the Danish model in a heartwarming speech after his triumph in Vienna.After beating Alexander Zverev to lift the trophy, the World No. 1 expressed his gratitude to his parents and girlfriend in the stands, referring to Hasanovic who had been cheering him on alongside his family."To my team, I have to speak in English. Thank you so much for the support. The work you put in, the effort... also to understand me at times is not easy, but thank you for putting in the effort. Everyone here, with family, my girlfriend, friends. To my whole team and also those watching at home. Thank you so much for the support," Jannik Sinner said.On the tennis front, Jannik Sinner has been drawn alongside Alexander Zverev and Ben Shelton in the Bjorn Borg group at the ATP Finals. The final spot in the group will be taken by Felix Auger-Aliassime or Lorenzo Musetti, depending on whether Musetti can beat Novak Djokovic in the Athens final.