Robbie Keane and Jose Villarreal netted in their opening league win . The Reds have won just one of the last six games against Manchester United at Old Trafford - a 1-0 defeat on September 22, 2011 - but they are unbeaten since then.
Robbie Keane and Jose Villarreal netted in their opening league win . The reigning MLS champions have not lost at home in 17 league games . Retired Landon Donovan joined team-mates to celebrate last season 's MLS Trophy win , the fifth in the club 's history .