Luke Shaw would only give himself a grade C- for his frustrating debut season at Manchester United.
Shaw, 19, became the most expensive teenager in world football when the left-back joined United for an initial £27 million from Southampton last summer.
But he has endured an injury-hit spell at Old Trafford and has failed to replicate the form that saw him named in the PFA Team of the Year last season and earn a place in England's World Cup squad.
"It's been a frustrating one because of the injuries I've picked up but I'm loving it," Shaw told Match of the Day magazine.
"If I was to write a school report on my first season here I'd give myself a C-. You don't realise just how big Man United is until you're actually here -- it's frightening. It is the biggest club around."
The England international has only made 17 appearances for United and has not featured since last month's FA Cup defeat to Arsenal.
But he has returned to training and should be fit enough to feature in Saturday's clash with league leaders Chelsea -- the club he supported as a boy.
And he said he would be put in a strange position if he opened his account for United against Jose Mourinho's team.
"I used to watch Chelsea every week," he added. "It was really good when I got to play at Stamford Bridge, I would say that's my favourite away stadium to go to -- Chelsea is one of the first games I look for when the new fixtures come out.'
"I haven't scored yet so I don't know. If my first goal was to come against Chelsea I'm not sure what I'd do."