It’s hard to imagine that a match where one player leads the head-to-head 16-3, and has won 15 of the last 16 meetings, could be considered a toss-up. And if you have money on this match, you probably won't consider it that. By every measure, Novak Djokovic is the favorite in his semifinal with Stan Wawrinka: Djokovic has the higher ranking, he’s playing on his favorite Grand Slam court, he's been in top form during the tournament, and he's the guy with the lopsided lead in the head-to-head. But there persists the thought, at least in my mind, that Wawrinka has an equally good chance of winning.