Manchester United manager Sir Alex Ferguson was unhappy with his side's performance after they beat Ajax 2-0 in the first leg of their Europa League knockout tie.

Goals from Ashley Young and Javier Hernandez after the break were enough to give United the win in Amsterdam.

"I'm delighted with the scoreline," said Ferguson. "It was an ordinary performance and didn't reach any great height. We didn't play well at all and didn't have any rhythm. There wasn't any tempo to our play in the first half, but in the second half we improved.

"It wasn't a brilliant performance, but it's good enough. The second goal gives us a good opportunity at Old Trafford to get us through."

United host the Dutch side at Old Trafford for the second leg next Thursday.