Coco Gauff's parents, Candi and Corey Gauff, congratulated their son, Codey, on the official signing of his letter to play baseball at the University of Missouri. The American tennis player and her boyfriend, Jalen Sera, also dropped reactions to Codey's feat.Candi shared pictures of the Gauff family posing together, as well as Codey signing the letter. "We are proud of you!!! Congratulations on the official signing of your letter of intent to play baseball at Mizzou University! Remember to keep God first, make the right choices, and always remember I will always be your #1 fan and forever your mom. You can always call me no matter the time or situation," wrote Candi Gauff. View this post on Instagram Instagram PostThe post drew the attention of Corey Gauff, who expressed pride in his son's achievements:"Son so proud of you and the work you consistently put in your craft this is a next chapter new start and your dreams and goals remain in tact and in front of you Love you man."Gauff's father's commentGauff's boyfriend, Sera, also reacted to this post, commenting:"🔥🔥🔥"Jalen Sera's commentCoco Gauff chose to reshare the post on her Instagram story with a note that read:"Signing day for my lil bro😭🤍 so proud of you. Go be great. My GOAT, my inspiration, my reason, my first friend. I love you! Proud of you! #01"Gauff's Instagram storyThe American's latest appearance on the court was at the WTA Finals. She crashed out of the tournament after losing two of her three round robin encounters. Her final match was a straight-sets loss to Aryna Sabalenka.Coco Gauff opened up about the importance of her brothers in her life During an interview with Vogue in April, Coco Gauff spoke about her relationship with her two brothers, Cameron and Codey Gauff. The World No. 3 also shared the significance of their presence in her life and how it affects her."My brothers Codey and Cameron are definitely my biggest support, and they always root for me. And humble me. When I do well, they’re still going to make fun of me. And when I do bad, they’re still going to make fun of me," Gauff said."Sometimes, when you’re competing, you feel like you’re putting your whole life into whatever match you’re playing and that the odds are life or death, that’s what’s on the line. But obviously, it’s not. Having people like them around makes you feel that pressure less."Coco Gauff frequently hypes up her brother, Codey Gauff, for his baseball achievements by posting sweet words of encouragement on social media.