Wayne Rooney acknowledges that Manchester United cannot afford to keep falling behind in games during the opening exchanges.
Sir Alex Ferguson's side have picked up an unfortunate habit of conceding early on, with another scare suffered during a UEFA Champions League clash with CFR Cluj on Tuesday.
United rallied to secure a 2-1 victory on Romanian soil, courtesy of a Robin van Persie brace, but have now found themselves trailing on six occasions already this season.
Rooney acknowledges that they need to tighten up and cut out the early setbacks if they are to challenge for top honours at home and abroad.
"It does bother us having to come from behind because we are losing those early goals," he said.
"It is not nice and it is something that we have to stop because we cannot afford to keep letting teams get a head start on us, especially in the Champions League because it is difficult to win the game anyway.
"We have to make sure we are more solid and hopefully we can be in future games."