Serena Williams is a competition winner.
Serena Williams . She is also the only tennis player to have won 10 Grand Slam singles titles in two separate decades . She also holds an all-time record for the most singles matches won at the Grand Slams ( man or woman ) with 316 matches ( through the 2017 Australian Open ) . Serena has also won four Olympic gold medals , one in women 's singles and three in women 's doubles -- an all-time record shared with her sister , Venus .