Rooney's 100th league goal helps United down Arsenal

London: Wayne Rooney scored his 100th Premier League goal Sunday as Manchester United beat Arsenal 3-1 to subdue a title rival while maintaining the pressure on leader Chelsea.

While Rooney claimed the goals milestone, the blistering pace of Nani was the key ingredient to securing a victory that puts United a point behind Chelsea and four ahead of Arsenal.

The opener came after 33 minutes when Nani stormed down the right and goalkeeper Manuel Alumnia palmed in his cross. Nani was the provider again four minutes later, squaring for Rooney to score.

Any hopes of an Arsenal comeback were ended by Ji-Sung Park ripping through the defense before slotting home seven minutes into the second half. Thomas Vermaelen scored a late consolation.