Not wishing to spoil the fun, but I was speaking to an Arse fan at work (potentially preparing himself for the assault), who said Wenger has been overplaying him this season, and his stamina (lack of) was fairly well known at Real Madrid IIRC.
Still, Silva has just come back from injury. First 70 minutes against the best club side in the world whom he proceeded to bend over with no lube, and next game against the league leaders.. He's had his own problems.
Like we've covered time and time again, Silva isn't just a playmaker, he's a meastro. He doesn't just provide the final pass, he runs the game. There's a huge difference.