Tennis star Alexander Zverev (25) congratulated Sophia Thomalla (33) on her birthday. The athlete published a sweet couple post on Instagram in honor of his girlfriend.

Zverev writes about two pictures in which the two pose happily and entwined in a pool in front of the sea: "Happy 18th birthday, for the 16th time." In a third picture, Thomalla snuggles up to her loved ones on a boat. She commented on the post with a heart emoji. The two made their relationship public about a year ago.

They are currently taking a break in the Maldives, as Thomalla writes in her own post. In one photo she is standing in front of the sea with an opulent bouquet of roses in her arms. In the caption, she describes how her boyfriend's family are supporting him at every level to get him back on the pitch as soon as possible, "while trying to stay off TV shows for as long as possible to celebrate my birthday with them on this one beautiful place to enjoy".

Zverev, whom she calls Sascha in her post, currently has to take a break. He had suffered a serious ligament injury at the French Open and bone edema during physical training. For Thomalla, however, it will soon continue, as she writes: "Unfortunately, I'll be back next week."