Former Manchester United goalkeeper Mark Bosnich believes the Red Devils must get firing quickly or could be out of the title if they don't beat Arsenal at Old Trafford in November.
Bosnich believes United cannot afford any more slip-ups before they play the Gunners and has insisted the Red Devils must start firing after their latest defeat at home to West Brom this past weekend.
David Moyes' side have now lost three of their opening six Premier League games and have suffered their worst start to a league campaign in 24 years.
And, with matches against Sunderland, Southampton, Stoke and Fulham to come, Bosnich has warned his old club they must take maximum points if they don't want to face a must win match against Arsene Wenger's side in November.
Speaking to the Alan Brazil Sports Breakfast show, the ex-United shot-stopper said: "They haven't got that much time. You don’t want to be facing Arsenal having to win to stay in the Premier League [title race].
"They have to be very, very careful. Gary Neville said earlier in the season that when Jose Mourinho came in at Chelsea [in his first spell], United lost the title early in the season. They can’t afford to get too far behind."
United's next league match is a trip to the Stadium of Light to take on bottom of the table Sunderland and will be desperate for victory.