Manchester United boss Louis van Gaal says his side's second half performance against Swansea City was the best so far this season.
The Red Devils enjoyed 64% of possession, creating more than 15 goal opportunities but failed to take anything away from the Liberty Stadium.
It is United's second Premier League defeat since November but a costly one as they surrender third place in the table to Arsenal who were victorious at Crystal Palace.
"I think it was our best second-half [performance], we created a lot of chances and dominated the game but we didn't score," van Gaal told MUTV.
"That's football, you have to score out of the chances you create. We had a lot of chances, especially in the second half, but they scored and then you know that it shall be difficult.
"I shall say to the players that it is very disappointing but, in the process of the development of our play, then it was a very good match.
"To play like this, so dominating, creating so many chances, you can hardly improve apart from scoring goals, but that is also a bit of luck."
Meanwhile, the Dutchman confirmed striker Robin van Persie suffered an injury that prevented him from running freely.
The 31-year-old left the Liberty Stadium with a protective boot around his right ankle and will be assessed later on today.
"We dominated the game even with 10 men because Robin van Persie could not run anymore after the injury," he said.
