Arsene Wenger has praised Andrey Arshavin's creativity and backed the Russian to regain his best form if he plays with confidence and freedom.
Arshavin made an instant impact when he arrived at Emirates Stadium with a series of sparkling performances, but could not maintain his form.
He has been a source of frustration for many supporters over the past couple of seasons and has not been a regular starter since Gervinho arrived last summer.
However, with Gervinho away at the African Cup of Nations, Arshavin is poised to get an opportunity to impress in Sunday's game against Swansea.
Reports have suggested the 30-year-old could soon be on his way back to former club Zenit St Petersburg, but Wenger insists he can still play a key role for the Gunners.
The French manager has also insisted that, whatever impression he might give to fans on the pitch, Arshavin is a very hard worker and often makes an important contribution.
"We know he has the talent. He has been questioned many times, but his attitude has always been spot on," said the Arsenal manager.
"In the last game specifically, he showed that he needs to play with confidence and freedom, that is his strength.
"Andrey is a creative player and you need that fraction of belief and confidence to play with freedom.
"He has always been a player who plays on the borderline, he is a big gambler.
"But at the end of the day against QPR, he gave the ball to Robin van Persie to score in that game.
"Sometimes the visual impression you get from a game has been frustrating, but he is very efficient."
Swansea have competed well so far in their first Premier League campaign, especially at home where Brendan Rodgers' men have won four and lost just once.
Wenger has been impressed by the Welshmen, who came up via the play-offs.
"They have the quality to play in the Premier League because they play positive football," the Arsenal boss said.
"Swansea play without fear anywhere. They have just won at Aston Villa and overall I think they are a team who looks completely in their place in the Premier League."