Pierre-Emerick Aubameyang had the chance to score his first hattrick for Arsenal, but let Alexandre Lacazette take the spot-kick, and the French striker made no mistake in steering the ball past Butland.
And explained afterwards that it was a tribute to his grandmother, who passed away recently.
But the Gunners endured a frustrating first half, before scoring three goals in the last 15 minutes to take the Premier League points.
"He's got to be 100 per cent right that's a penalty".
Lambert said he was unhappy about the referee's penalty decision, awarded for a foul by Bruno Martins Indi on Mesut Ozil, that led to Arsenal's first goal in the 74th minute.
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Arsenal will host CSKA Moscow in Europa League quarterfinals this Thursday. It was more stretched and we kept losing cheap balls.
"With my experience I can anticipate that; we don't go for the championship or for the top four, we are in front of a big game [Chelsea v Tottenham], it's Sunday afternoon on Easter.
Because when you play against a team who wants to stay in the PL nowadays, you have a fight, and you have to be ready mentally for it".
Trouble is, Honigstein says that Wenger isn't moving, despite the fact that his side is a huge 13 points off fourth place in the EPL, and has looked more lost than ever.
Chances were few and far between in a turgid first half at the Emirates Stadium, as Xherdan Shaqiri went close early on, before Aaron Ramsey clipped the top of the crossbar in the only two clear-cut opportunities.
Cast your mind back to August 2017, at the start of this season, when Stoke City beat Arsenal at the bet365 and we all thought they would finish ninth again. "It was a game changer", he said.