The game had already been killed off with Mascherano being sent off. The Manc's had numerous chances from open play to kill the game off anyway, other than the corner from which Ronaldo scored from.
Babel's contribution was perfunctory at best.
He got in the position to put a cross in with his left foot, but couldn't, again.
Winning a couple of corners and a free kick doesn't constitute a good performance. Any half-decent player with pace could manage that on the counter, bomb it down the wing, make an ineffective cross and hope the ball ricochets out. He showed nothing against the Manc's that we didn't already know. He's got a bit of flair and pace that can be effective at times, but needs to work harder, focus and improve his decision making. In terms of end product, he's not giving us much, and I would have hoped for more than what we're getting.