Rafa has done his reputation no harm at Chelsea: They're in line for a CL spot, are in the Europa final, and he's managed to out-duel Ferguson each time they've met this season. That comeback at Old Trafford when they were good and dead in the FA quarterfinal was a reflection of how strong a tactician he is (that is his forte). You could tell he's worked on his weaknesses during his time away from management: he now singles out individual performances more (something he never did at Liverpool), and his teams are much more attacking-minded (he would never have played Mata, Hazzard, and Oscar all at once). He went for the win at Old Trafford, when he probably would have settled for the draw previously.