Manchester United midfielder Park Ji-sung is aiming to push on after completing his first match of the season.
The South Korea international played 90 minutes in the 1-0 win over Valencia in the UEFA Champions League on Wednesday.
His first-half display was poor but he improved after the break as United went on to win thanks to substitute Javier Hernandez's late effort.
Park now hopes his performances will improve after a difficult start to the campaign since returning to Old Trafford from this summer's World Cup.
He said: "I am not satisfied with my performances this season.
"I don't know why my performances have not been good. Maybe I was not ready for the season.
"But mentally I have been weak and I have to improve.
"In the first-half last night my performance was bad but at least the second was better."
Wednesday night's game was Park's third outing in a week and the South Korean believes he is starting to get some continuity.
"It is always difficult to get the balance," he said.
"I missed a couple of games and then played again, although since I joined Manchester United it has been like that so I should know how to deal with it."
Park also believes United will be able to compete without striker Wayne Rooney, who is set for a three-week stint on the sidelines with an ankle injury.
Although most of Rooney's absence is covered by the forthcoming international break, he will sit out Saturday's trip to Sunderland and possibly the home encounter with West Brom a fortnight later and the clash with Bursaspor on 20th October.
Park added: "Throughout Manchester United's history we always come up with answers to problems.
"Big stars come and go but still the team keep producing the same performances.
"We just concentrate on that to make sure we show our quality on the pitch."