Manchester United midfielder Shinji Kagawa has admitted that he is finding it harder than ever to score goals.

The Japan international has found the net six times in 40 games for the Red Devils following his move from Borussia Dortmund in summer 2012.

Despite his troubles in front of goal, the 24-year-old is confident that he has time to put things right.

"I've never had so much trouble not being able to score goals," Kagawa is quoted as saying by Goal.com. "Right now it's just trial and error.

"The season's still continuing, so I just have to find a way to recover my form. This is my big challenge."

Kagawa has failed to score in 16 appearances for United so far this season.