Manchester United secured a 2-0 victory over 10-man Crystal Palace thanks to goals either side of half-time from Robin van Persie and Wayne Rooney, while Marouane Fellaini made his debut.
The Belgium international, who completed his £27.5m move from Everton on the final day of the transfer window, received a warm reception from the United faithful, who watched their side record a comfortable win against last season's Championship play-off winners.
Van Persie opened the scoring for United in the first half when referee John Moss pointed to the spot after Ashley Young was brought down inside the box by last-man Kagisho Dikgacoi.
The South Africa international was shown a straight red card for a professional foul – leaving the visitors with a mountain to climb.
Last season's Premier League top scorer coolly slotted the ball into the bottom corner from 12 yards to earn David Moyes his first victory at Old Trafford since succeeding Sir Alex Ferguson, who was at the stadium to watch the Red Devils for the first time since retiring at the end of last season.
Moyes' side pilled on the pressure in search of a second goal after the half-time break, and their persistence was rewarded with 10 minutes left on the clock courtesy of Rooney's fine free-kick.
The England international curled the ball perfectly over the wall and into the net past Palace goalkeeper Julian Speroni, to temporarily move United up to second place in the table.
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