Originally Posted by Mustard
Rafael Nadal. The Rome finals of 2005 and 2006 are the best example. In the 2005 Rome final, Nadal trailed 0-3 (2 breaks) in the fifth set against Coria, and Coria had a game point on his serve for a 4-0 lead. Nadal came back to win in the fifth set tiebreak, although it took 4 championship points for Nadal before it ended. In the 2006 Rome final, Nadal trailed 1-4 (1 break) in the fifth set against Federer, saved 2 championship points when serving at 5-6 in the fifth set, and came back from 3-5 down in the fifth set tiebreak to win 4 points in a row and take the title.
Because turning the match on the surface, that suits your game the most, and, in the case against Federer, having a favourable match-up against your opponent, shows exactly that.