Since arriving from Lyon for €53 million in July, the Frenchman has scored just nine goals in 29 games in all competitions.
Worryingly for Wenger, that gap could grow even bigger on Sunday when fourth placed Liverpool play their game in hand at Southampton.
Arsene Wenger admitted losing Saturday's north London derby to Tottenham Hotspur has made it even more hard for Arsenal to achieve a top-four finish in the Premier League this season. Sanchez did indeed leave the Emirates Stadium, joining Manchester United as the highest-paid player in the Premier League, but Ozil signed a new three-and-a-half year contract, with Henrikh Mkhitaryan and Pierre Emerick Aubameyang joining. Arsenal has endured a torrid Premier League season as they find themselves at the 6th spot in the league table with 45 points from 27 games. "It is envisaged that he will return to the squad within four to six weeks", read an Arsenal statement.
Arsene Wenger admits Arsenal could not afford to lose Saturday's derby to Tottenham and fears their top-four hopes are beginning to look slim.
They play in Sweden's top division, The Allsvenskan. "There is no reason why I should rest players".
"Looking at their results in Europe, they have done well so we have to prepare properly", Wenger said about the club led by English manager Graham Potter, a former Football League defender.
For Tottenham, however, it was a promising sign considering the fact that a slow start to the game cost them Liverpool's opener last week.