Manchester United will rue what could have been after a 1-1 draw with Arsenal at Old Trafford in their Barclays Premier League clash.

After a goalless first half, Jose Mourinho’s men had come out all guns blazing in the second half, and were rewarded when Juan Mata finished superbly off a pass from Ander Herrera.

The Gunners had difficulty creating chances and did not have a shot on goal until the 89th minute, when substitute Olivier Giroud rose above everybody to connect with a cross from Alex Oxlade-Chamberlain and power a header past David De Gea.

One of the major talking points of the game was referee Andre Marriner’s decision not to award Manchester United a penalty after Nacho Monreal had brought down Antonio Valencia inside the penalty area.

“The result in the end is positive for us because we were 1-0 down with two minutes to go,” Arsenal manager Arsene Wenger said after the match.

“The players who came on made a massive difference today. When you are 1-0 down and come back to 1-1 of course you have to feel happy.

“We lacked a bit of sharpness today. What is it down to I don’t know but at least we came back.”

“I don’t want to speak about it,” Mourinho said about the penalty decision. “He [Andre Marriner] is the kind of referee who if he make mistakes against my team there is no intention. He doesn’t want to be the star of the game, he is a good referee. I don’t want to say if it is a mistake or not. I know because I saw the video, but I don’t want to say because he is a good referee.”