Alexis Sanchez is tired- Arsene Wenger

Tomiwa Babalola

Arsenal manager, Arsene Wenger has revealed that Chile international, Alexis Sanchez may be suffering from fatigue following his impressive Premier League performance in the first half of the season.

The former Barcelona forward has helped the Emirate side when it mattered in the season with 18 goals in 32 appearances after moving from the Camp Nou to the North London side for 35 million pounds ($53.91 million) in July.

The 26-year old striker was injured in last week's 2-1 win over Leicester City and Wenger conceded that Sanchez may be showing signs of fatigue.

"He had not the same intensity in his game as he had until now," said Wenger, whose side are fifth in the Premier League table with 45 points from 25 games.

"I'm not sure he was free in his head to sprint as he used to. I don't know if it was down to the kick he got on his knee, but he was not himself.

"He has a swollen knee and he cannot move well, but it's only a kick, nothing else."

Sanchez, who has also seen action in the Serie A was not in action for the Gunners when the Wenger-led side defeated Middlesbrough 2-0 in the fifth round of the FA Cup on Sunday.

Arsenal's next Premier League fixture will be against Alan Pardew's Crystal Palace next weekend, and will be hoping to get back to the top four after the game.