There are a number of candidates who will be competing long after Venus and Serena Williams hang up their tennis shoes, as evidenced by the number of American women making it past the US Open first round.
If you can't go any bigger than that, Ernests Gulbis, it's time to go home. The Latvian's remarks about professional tennis players and motherhood were insensitive, but not even Maria Sharapova could take them seriously.
Steffi Graf has done it. So hasn't Margaret Court and Maureen Connolly. Serena Williams is primed to join their company as the winner of a true Grand Slam this year, but it all starts with getting past Victoria Azarenka in the Australian Open.
It's no secret Venus and Serena Williams have changed the game of tennis. But 2014 will show further evidence of their influence on the court, as an even more diverse group of American women hits the pros.
It used to be teen queens like Martina Hingis winning Grand Slams. Not anymore. Three of the four US Open women's semifinalists are over the age of 30 due in large part to more comprehensive fitness and nutritional plans