Manchester United defender Luke Shaw believes that he has "learned" a valuable lesson following his sending-off against West Ham United.

The 19-year-old was sent off in stoppage time in his side's 1-1 draw against the Hammers for a poor challenge on Stewart Downing, and as a result missed the Red Devils' win over Burnley in midweek.

Shaw told the club's official website: "It was a very frustrating one, especially as it came in the last seconds of the game. It was very frustrating for me.

"Maybe the first yellow card was a little bit light but I can't argue with the second one. It was in the heat of the moment and I wanted to try to win the ball as we were going for the win. I was unlucky to have caught him but it's something I've learned from."

Louis van Gaal's men face Preston North End on Monday in the fifth round of the FA Cup.