When we discuss which players thrive as "closers" and "fighters" and "frontrunners," we tend to look at their match results. But these same tendencies and rhythms express themselves during games. Want to know how Rafael Nadal was able to win last year's U.S. Open? Note what happened when he either led a game 30-0 or trailed in a game, 30-0. This heat map shows the men's and women's tournament average -- and the results from top players -- based on their in-game position.