Angel Di Maria has conceded that he has not been good enough for Manchester United in his debut season in the Premier League.
The Red Devils smashed their transfer record to sign the Argentine in a £59.7m deal from Real Madrid last summer.
However, Di Maria has failed to find his best form as he has scored just three goals in 26 appearances, and has spent the last two months out of the starting lineup.
"I'm not happy with my first year in England," Di Maria is quoted as saying by The Mirror. "I moved here from Real to win titles and this season has been very bad for me. I'm frustrated because I want to do better.
"The fans in England have not seen the real Di Maria. I know I can offer a better level. This year was not good enough."
Louis van Gaal has claimed that Di Maria has to adapt to his style to thrive under his management at Old Trafford.
