Coco Gauff's boyfriend Jalen Sera recently delivered an adorable reaction to the American WTA sensation showing off her stylish and fashionable side in a post-Thanksgiving photodump. Gauff and Sera began dating in 2023, with the two-time singles Major champion confirming the couple's relationship status earlier this year.On Saturday, November 29, Coco Gauff took to her Instagram and shared a post consisting of 14 pictures. Some of the pictures featured the 21-year-old WTA star posing in a variety of striking outfits. One of them suggested that both Gauff and Sera have purchased customized photo keychains consisting of special moments they spent together. The 11-time career singles titlist captioned the post:"Off szn" View this post on Instagram Instagram PostNot long after Coco Gauff shared the post, her boyfriend Jalen Sera entered the comments and delivered his reaction, which reflected the wonderful time the lovebirds have been spending together as the WTA star relaxes before eventually beginning her preparations for the 2026 tennis season."Quality time🩶," Sera wrote.Jalen Sera's comment on Coco Gauff's Instagram post, dated Saturday, November 29, 2025 (Source: Instagram/cocogauff)On the tennis front, Gauff's 2025 season ended on a disappointing note.Coco Gauff's WTA Finals title defense was a forgettable oneCoco Gauff in action at the 2025 WTA Finals (Source: Getty)In 2024, Gauff marked a fantastic end to her season by winning the prestigious, year-end WTA Finals in Riyadh, Saudi Arabia. This year, despite struggling with her form and results, the American once again qualified for the year-end event. However, her title defense was not at all a strong one, as she exited the tournament after winning only one of her Round Robin phase matches.Gauff's first match in Riyadh this year pitted her against compatriot and former doubles partner Jessica Pegula, which the latter won in three sets. Next, the 21-year-old registered a comprehensive straight-set victory against Jasmine Paolini. The American's fate was sealed in her third outing, with reigning World No. 1 Aryna Sabalenka defeating her 7-6(5), 6-2.In the aftermath of her exit from Riyadh, Gauff took to Instagram and wrote:"My 2025 season is officially over and it was a longggg one. I played my first match of this season December 29th, 2024 and my last match of the season November 6th, 2025😳🫩. It was filled with some disappointments but mainly positives and when I look back at it, I feel proud of all the things I accomplished. I love this sport and I am grateful for all of its ups and downs."The American is soon set to begin preparing for the 2026 season, with its first Major, the Australian Open, slated to take place in January.