Manchester United moved into sixth place by claiming all three points against Crystal Palace thanks to goals from Robin van Persie and Wayne Rooney.
The strike duo scored in the second half after Manchester United's attacking quartet of Rooney, Van Persie, Juan Mata and Adnan Januzaj were unable to break down a resilient Crystal Palace side in the opening 45 minutes.
Manchester United had an incredible 72 per cent of possession during the first half but were well marshalled by Tony Pulis' side.
Red Devils midfielder Marouane Fellaini, who was making his first appearance since the beginning of December, had the best chance before the interval but blazed his shot over the crossbar.
The aforementioned Rooney also came close to giving his side the lead however his curling shot was cleared off the line by Damien Delaney.
The Premier League champions continued to dictate play shortly after the break but were unable to fashion an opportunity to work Crystal Palace goalkeeper Julian Speroni.
Manchester United's luck changed in the 60th minute when David Moyes' side were awarded a penalty after Marouane Chamakh fouled Patrice Evra inside the penalty area.
Van Persie managed to dispatch the penalty by sending the diving Speroni the wrong way to break the deadlock and give his side the lead.
The Dutchman's strike partner Wayne Rooney, who signed a new £300,000 per week contract on Friday evening, proved his worth six minutes later by getting himself on the scoresheet.
Rooney managed to caress the ball past the helpless Speroni and into the top corner on the half volley without even having to control a low cross from Evra.
Van Persie should have put the game to bed when he was allowed to run through on goal unchallenged, however his powerful shot came crashing off the woodwork.
Crystal Palace manager Pulis sent on attacking trio Cameron Jerome, Yannick Bolasie and Dwight Gayle in hope of pulling a goal back but the Eagles were unable to get past the sturdy partnership of Rio Ferdinand and Nemanja Vidic.