Guess The Goal: Who scored this late winner?
Did you ‘Guess the Goal’ from our graphic?
As you can see when watching the goal below, Paul Scholes had initially tried to score with a powerful effort that was blocked by a wall of brave Baggies defenders.
The ball is then worked out wide via Antonio Valencia to van Persie, who cuts inside onto his left foot, takes a touch and unleashes a whipped finish that nearly burst through the net...
United clinched a hard-earned 2-0 win over West Brom to build a seven-point lead at the top of the Premier League table, in rain-sodden conditions at Old Trafford.
Gareth McAuley deflected Ashley Young's cross past Ben Foster for the opening goal and a tense game ensued, until substitute van Persie sealed victory with a curling finish in the 90th minute.
The outcome was a welcome early birthday present for Sir Alex Ferguson, who was set to turn 71 in what was his final season as manager.
Sir Alex Ferguson: “Robin is a fantastic player. He came on and changed the game for us. Every time the ball came up to him he got hold of it and turned on them.
“They were having to go back to their box all the time and he has done well. West Brom were a very resilient, stubborn team.
“They worked really hard on their defending and closed all their ranks. You have to deal with that but the slowness of the pitch killed our speed a bit.”
United v West Brom kicks off at 20:00 GMT on Saturday.