The 27-year-old has netted once in the seven games since returning from a two-month injury layoff at the end of January, and looked uncharacteristically sloppy in Tuesday's Champions League defeat by his former club Barcelona.
This Sanchez is a far cry from the one Gunners fans fell in love with last season, after the Chilean netted 24 times in all competitions following a £35 million move from the Catalans in 2014.
However, Wenger says that his talisman is conscious of his woes, and backs him to back fighting in the near future.
“He has taken time but I am confident he will recapture it soon,” Wenger said to reporters at a press conference, via London 24.
“He is a highly motivated player and he is conscious of that – he wants to be better. Let’s focus on a team performance and then every player will benefit from that.”
How Arsenal supporters would love if the real Alexis Sanchez stood up on Sunday, with the North Londoners facing a tricky visit to Manchester United in the Premier League.
Victory could see them move top of the table if Leicester City and Tottenham Hotspur lose at home to Norwich City and Swansea City.
He has netted 10 goals in all competitions so far this season.