Boss Mikel Arteta admits Arsenal have no room for error if they want to make a late Champions League charge.
Bukayo Saka's first Premier League goal and Alexandre Lacazette's late finish sealed a vital 2-0 victory at Wolves in the race for Europe.
The Gunners moved into seventh, three points behind Wolves, after a third straight top-flight win without conceding.
They are six points behind the top four - before Chelsea's late game against Watford on Saturday - and Arteta knows what is at stake.