Manchester United manager David Moyes admits he is concerned by his side's current form after West Bromwich Albion inflicted upon the Premier League champions their third defeat of the season.
Second half goals from Morgan Amalfitano and Saido Berahino, which sandwiched Wayne Rooney's fortunate equaliser, secure the Baggies' first win at Old Trafford since 1978.
Despite introducing Robin van Persie late on, United were unable to recover late on and having won just two of their opening six league games in the defence of their title, Moyes has admitted his concern.
"We didn't defend well in the second half but, when we got back in, I expected us to win it with the talent we have got," Moyes told BBC Sport.
"No worries about the crowd because it was great. The stadium in mid-week was in great voice. People come here expecting us to play well but we didn't play well. We tried to pick it up in the second half but we got done by it as well.
"You're always going to have bad results," he added. "It is how you deal with them. There are lots of games to come and it's about how you deal with them, so we look forward to them."
"I thought we controlled the game but couldn't get the telling finish," Moyes said. "We lacked an intensity and spark to our game.
"I'm concerned after today but there are a lot of games to go and we'll try to put it right.
"We didn't defend well and we didn't attack well. It's about how you deal with bad results and move on."
Moyes had demanded a reaction following the derby defeat to Manchester City the previous weekend, but United produced an insipid display which calls into question their ability to retain their league crown.
West Brom in stark contrast played with enterprise and freedom and began with Stephane Sessegnon and Victor Anechebe in attack and created numerous opportunities before eventually going ahead nine minutes after the break through Amalfitano's clever goal after he beat Rio Ferdinand and then chipped David de Gea.
Rooney's free-kick, which went all the way in from a wide position, pulled United level but West Brom got the winner mid-way through the second period as Berahino hit a stunning half-volley to confirm back-to-back league wins for the Midlands club in manager Steve Clarke's 50th game in charge.
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