Manchester United striker Wayne Rooney reflected on their FA Cup 2-1 defeat to Arsenal, which saw Louis van Gaal's side crash out of the competition on Monday night.
The Red Devils were denied a semi-final tie at Wembley after Arsene Wenger's men beat United, with Danny Welbeck scoring the winning goal.
Nacho Monreal scored the opener in the 26th minute and United responded within three minutes through the Reds captain Rooney.
But in the second half, Antonio Valencia made a costly mistake when his back-pass to David de Gea was intercepted by former United striker Welbeck - who scored on his first return to Old Trafford.
The Reds later went down to 10 men when Angel di Maria was sent off by referee Michael Oliver, summing up a bad night for the Argentine and Manchester United, as they handed Arsenal their first Old Trafford victory since 2006.
"We're obviously disappointed," Rooney told MUTV. "Going into half-time having equalised, we felt that we'd create enough chances to win the game, but it wasn't to be. Conceding the second goal the way we did in the second half meant that we were always chasing the game afterwards; they made it difficult for us and defended well.
"It was a close game; it could have gone either way. Mistakes happen, but it's not nice when you're on the receiving end of one which costs us a goal. It's a hard one to take, but we have to dust ourselves down and get ready for Sunday."
He added: "I want to win the cup for and with the team; it's not about me wanting to win the FA Cup," he said. "That's why it's so sad for us to get knocked out today; we knew we'd have a great opportunity if we'd won tonight."