 That's something that differs a little bit between the men's game and the women's game. So let's start with Federer as an example. Over his career, he's won just short of 70% of his points on serve and just short of 40% of points on return. So that works out, if we average it out, that works out to about 55% total. It's a little bit less than that because he played more points on return than he did on serve because he was so dominant.