Serena Williams sends retirement message to Roger Federer.
The biggest stars of the tennis world will announce their retirement from their sport this year.
Roger Federer has also announced retirement after Serena Williams, which is sad news for tennis fans.
Serena Williams announced her retirement only after the US Open 2022.
Both these players are eaten by great tennis players.
Serena Williams (23) won Grand Slam titles.
Roger Federer (20) won the Grand Slam title.
Serena Williams posted a message for Roger on social media.