Arsenal beat Liverpool as they closed the gap on the Premier League leaders to just two points.Gabriel Martinelli and Leandro Trossard struck in the second-half as the Gunners enjoyed one of their biggest wins under Mikel Arteta.Arsenal had taken the lead in the first half when Bukayo Saka struck, but a Gabriel own-goal made it 1-1 at the break.The Gunners fought hard to claim the win in the second-half and they are now just two points off League leaders Liverpool.