Lacazette has been criticised after he came off the bench and missed a great late chance in the Gunners’ 1-0 north London derby defeat to Tottenham on Saturday.
The French forward has scored just nine goals in 29 games in all competitions in what has been a difficult first campaign and now Wenger has admitted Lacazette may have been affected by the recent signing of Aubameyang from Borussia Dortmund.
Wenger has backed Lacazette to rediscover his best form soon but feels Aubameyang’s move has had a negative impact on him.
Wenger said: “For him, one against one with the goalkeeper, he is a good goalscorer. He has gone through difficult periods before. He works hard in training, works on his finishing.
“Maybe the confidence is not at its highest because he has seen a competitor coming in for him.”
Uwe Rosler was sacked by Fleetwood following a 3-0 reverse at Doncaster which condemned Town to a seventh straight defeat in all competitions.
Cambridge interim head coach Joe Dunne was pleased with how his side adapted to beat Grimsby 3-1.
Southend manager Chris Powell led the applause for Jason Demetriou after the right-back scored twice in the 3-1 win against Portsmouth at Roots Hall.
Morecambe boss Jim Bentley was the happier manager after Gregg Wylde's 90th-minute strike earned his side a point in their 1-1 draw with Forest Green.
Manager Gareth Ainsworth described Wycombe's 2-0 win at Cheltenham as a thoroughly professional performance.
Skipper Richard Wood scored the winner just before half time as in-form Rotherham pulled off a 1-0 victory at League One leaders Shrewsbury.