Martin Odegaard has described his penalty miss against Manchester United as a "crucial moment" in the game, with the Arsenal captain admitting it's "not good enough".

The Gunners were knocked out of the FA Cup on Sunday after a thrilling third-round clash that went the full distance. United played half of the tie with 10 men when Diogo Dalot was dismissed moments after Bruno Fernandes had put the visitors ahead. Gabriel equalised for the home side before Odegaard was denied from the penalty spot by Altay Bayindir.

Arsenal just could not find a way through Bayindir, who proved to be the hero in the penalty shootout when he saved Kai Havertz's penalty. “It’s a really tough one,” Odegaard said afterwards, as per Arsenal's official website.

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“Really frustrating. I think we completely dominated the game from the first half until the end. We could have been a bit sharper in front of goal, in the last pass, the last shot. To lose that game at home when we dominated everything, it’s a tough one.”

The Gunners captain added: “It’s hard to say at the moment exactly why, but I think it’s small details; the last pass, the finish, the decision-making. Again, I think we did more than enough to win this game – I don’t know if they had a better chance than the goal and we created enough to score. Me with the penalty as well, that should have been a goal.

“It’s not good enough from me, I have to score that one. I think it was a crucial moment as well, so it was a tough one to take. That’s it.”

Arsenal return to action on Wednesday night, with arch rivals Tottenham making the short journey across the capital to Emirates Stadium. Odegaard is keen for his side to return to winning ways against Ange Postecoglou's side.

“It’s a big game coming up and we just have to keep going, look for that one and win it, and just work from there," the Norwegian said. “We have to be together; we win and lose together.

"This is a tough one to take but we have a massive game coming up, we have lots to play for and we have to stick together, keep working hard, keep helping each other, supporting each other. Now it’s just time to look to the next game and win that one.”