Arsenal took the lead in the 23rd minute thanks to a sublime volley from midfielder Mesut Ozil.
"We dominated the game, shooting 24 times, but we needed to score the second to be relaxed".
Ahead of the match, the Gunners' boss spoke of how his side need to convert more of their chances, having had 66 shots in their last three league matches but only scoring twice.
Arsene Wenger: "We want to continue what we do well and improve the finishing, be a bit sharper in our finishing".
Pence trip to Middle East overshadowed by Jerusalem decision
The idea is that a two-state solution would give the Palestinians East Jerusalem and Israel the western half. Turkey has been one of the most vocal critics of Trump's December 6 decision on recognizing Jerusalem.
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The Magpies, meanwhile, are in a horrid run of form, taking just one point from their last eight league matches, leaving them one point above the relegation zone.
Since our last home game (Which we lost to Manchester United to end our winning streak of 12) we've slid out of the top four and are now stranded in 7 place, below Sean Dyche's Burnley who refuse to go away. As the Hammers game was midweek I expected to see some rotation from Wenger but it's clear that Lacazette should remain our frontman with Olivier Giroud being the clinical plan B.
Forward Theo Walcott is unlikely to feature because of a groin injury, while central midfielder Aaron Ramsey has suffered a hamstring injury and has been ruled out.
Newcastle have gone on to open the scoring in defeats at Chelsea and Man United - so maybe - just maybe, an early goal for the visitors might cause the home fans to voice their displeasure - making it a tough atmosphere for Wenger's men.
Head coach Rafa Benitez will also be without striker Aleksandar Mitrovic who is out with a back problem.