Manchester United defender Patrice Evra was unhappy with his side's second-half performance during their 2-1 win against Arsenal at the Emirates Stadium.
Robin van Persie cancelled out Antonio Valencia's opener with 20 minutes to go before Danny Welbeck popped up with a late winner.
"We played very well in the first half but the second half was not the best," Evra told Sky Sports News.
"It's a good performance for the team but I think the second half was 15 minutes where Arsenal played well. The most important thing today was to win."
United are now three points behind Premier League leaders Manchester City, who beat Tottenham Hotspur 3-2 earlier in the day.
