Arsenal beat Chelsea 3-0 after first half blitz

Britain Football Soccer - Arsenal v Chelsea - Premier League - Emirates Stadium - 24/9/16 Arsenal's Theo Walcott celebrates scoring their second goal with Alexis Sanchez Action Images via Reuters / John Sibley Livepic

Sept 24 (Reuters) - - Arsenal cruised to a 3-0 win over Chelsea on Saturday, scoring all three goals in the first half to claim their first Premier League victory over their London rivals in 10 attempts.

Arsenal gave their manager Arsene Wenger something to celebrate as he marked 20 years in charge of the club, punishing Chelsea for poor defending to race into a 2-0 lead within 15 minutes.