Louis van Gaal criticises "very bad" Anthony Martial

Manchester United manager Louis van Gaal has criticised the performance of Anthony Martial despite him being named man of the match in yesterday's FA Cup victory over Derby County.

The French forward was instrumental in his side's progression to the fifth round of the tournament at the expense of their Championship opponents, but speaking after the game, his manager was quick to point out his failings.

"The first 20 minutes he was very bad," Van Gaal told reporters. "Maybe you have noticed that because everyone is saying how fantastic he played - man of the match. But you have to play 90 minutes good.

"I have said that already to him otherwise I could not say it to you.

"But after that first 20 minutes he was fantastic."

The victory leaves United still in the hunt for their first FA Cup trophy in 12 years.