Serena Williams ( tennis player ) has singles titles .
She is the only tennis player in history -LRB- man or woman -RRB- to have won singles titles at least six times in three of the four Grand Slam tournaments , and the only player ever to have won two of the four Grand Slams seven times each -LRB- seven Wimbledon titles and seven Australian Open titles -RRB- .
Serena Williams