Top? Birsa...took the most shots, tried something and in the end sealed the 3 points with his goal.
Flop...well, Constant, Matri and Muntari were my favorites, but in the end I picked Constant. His defending was bad, he left too much space to De Silvestri (who was luckily poor like all Sampdoria players), insisted on attacking but his forward runs came to nothing or ended up with Sampdoria having a chance to make the counter. He's just not fit for Milan, neither as a midfielder nor as a fullback.