Manchester United ace Park Ji-sung says he is working hard to improve his game.
The South Korean international is ready to work hard to try and establish himself at Old Trafford.
Park has seen this season interrupted by injury and he is determined to make sure he is in top condition when called upon by Sir Alex Ferguson.
"Although I am 100 per cent in shape I always try to find something to improve in every match," Park told Yonhap news agency.
"I have to try to be perfect."
The 25-year-old marked a rare appearance in the starting line-up on Saturday against Charlton with a goal in the 2-0 win and he admitted he just tried to make sure he did not miss the chance after a mistake in the visitors' defence.
"I just tried not to miss the chance when Charlton's defenders were struggling to clear the ball. Fortunately for me it went in," added Park.