Manchester United injury news: Louis van Gaal explains what could have caused Anthony Martial's hamstring injury

Manchester United manager Louis van Gaal believes Anthony Martial's latest injury setback is down to tiredness. The striker was included in the starting lineup for the Europa League clash against FC Midtjylland, but was forced to withdraw after suffering a hamstring injury during the warm-up.

Marcus Rashford replaced France international as the Red Devils sealed a 5-1 victory over the Danish champions, which helped them progress to the next round of Europe's second tier club competition. The Dutchman has already confirmed Martial's injury is not serious, but was unable to comment whether he will be available for the Premier League clash against Arsenal on 28 February.

Wayne Rooney is sidelined with injury and the United captain, along with Martial are the only two recognised strikers in the squad. He has 31 starts to his name in all competitions since moving to Old Trafford from AS Monaco last summer. Van Gaal claims lack of options up front has forced him to include the 20-year-old regularly in his starting lineup this season.

"Anthony can be tired. He's only 20 and he's played all the matches so it's not so remarkable. He stepped down himself and that I like very much," United's official website quoted Van Gaal as saying.

"I have already explained to you the only muscle injury we have is Marouane Fellaini. That we know already when he played so many matches in a row.

"It's always like that when you don't have other players and it's difficult to change or rotate. So the next muscle injury would be [expected to be] Martial but I don't think he has a muscle injury. He is very intelligent - he steps down when his hamstring is tight.

"You have to cope with that, it's difficult also for the team because, after David De Gea, now Martial, and Martial and De Gea have played very good seasons, I think, and they have to be replaced."

Martial becomes the latest player to join United's treatment room. The list includes Rooney, Fellaini, Bastian Schweinsteiger, Matteo Darmian, Luke Shaw, Ashley Young, Phil Jones and Will Keane. However, Marcos Rojo came on as a substitute against Midtjylland, while Antonio Valencia and Adnan Januzaj have returned to training