West Brom took a 3-0 lead – and missed a penalty – before allowing the Gunners to claw two goals back.
While Arsene Wenger’s side head into the game having won eight out of their last 10 matches, the Dutchman has warned his team-mates against complacency if they are to take anything from the match.
"We lost to West Brom here last season and we must admit that we switched off that day," he told Arsenal’s Official Matchday Programme.
"We cannot accept that though, so we must not allow it to happen this time. We must learn big-time from that experience.
"There’s not one team in this league that you can underestimate. All of them have earned their stripes to be here, and this is the best league in Europe.
“So there is no excuse whatsoever to go into this game with any different feeling, especially after what happened last year.
"They were 3-0 up and had missed a penalty - at Emirates that is just not acceptable - so we have to learn from that.
“So this game is a big one - we have to put something right from last year, and we also have to keep our run going."
The striker has been in explosive form this season, scoring 10 goals in 10 Premier League games so far and picking up the October player of the month award.
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