In my opinion Monfils have potential to win this match, maybe even the tournament if he will play tennis of his life against Djok/Nadal, although still I think he got problems with picking right game in matches and I expect again he will start very slow against Stepanek like he did against Cilic, later on maybe if it will be not too late he probably take over the match, Stepanek played great against Muzza and didnt had a chance to play much against Del Potro. Still his classy serve and volley should win him quite a bit of games and if Monfils wont think in this match he might out run him. Czech is an old fox and if Monfils will fool around without idea for this match Czech might finally reach the final of big event for the first time in a while. Much is on Monfils racquet how he will come up to this clash, still more like a coin flip to pick the winner, as I said I think Monfils will start slow, opposite to Stepanek who probably will be slower in ending parts of the clash. Over looks good to me.