Man Utd have to improve - Van Gaal

Manchester United manager Louis van Gaal says his side "have to improve" despite a 2-1 Champions League win over Wolfsburg at Old Trafford.

Juan Mata's first-half penalty and Chris Smalling's 53rd-minute goal gave United their first Group B victory.

However, Van Gaal believes his side "played very well" and were "unlucky" not to score more goals.

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