Serena Williams
2012
Venus Williams is older than Serena by a year. Venus was born in 1980, and Serena was born in 81.
1995
Serena is a year younger. See 'related links' for more information.
In 2010 Serena Williams won the Australian Open and Wimbledon
Serena Williams.
Venus is older than Serena but about a year.
The answer is Serena Williams.
Serena Williams smashed hers recently at last year's US Open, and Roger Federer has as well.
Serena lost her semi-final match in the U.S. Open this year to Vinci by the score of 2-6 6-4 6-4
As of writing this answer, Serena Williams has won 23 Grand Slam singles titles, which is the most by any professional tennis player in the Open era (and puts her second all-time behind Margaret Court with 24). She is currently competing in the 2022 US Open tournament, where she is hoping to win her 24th title. Williams has said that she is planning to "evolve away" from tennis after this year's US Open.