Diego Costa was all Twitter talked about during Arsenal’s loss to Chelsea

This was peak Diego Costa.

The Chelsea striker, whocould easily have a post-football career as a WWE bad-guy, was at the centre of the action at the Emirates today. Costa was involved when Per Mertesacker got sent-off after 18 minutes. The Arsenal defender missed his tackle on Costa, who was racing onto a through ball from Willian. But many Gunners' fans felt the Brazilian born Spain international dived. Five minutes later, Costa scored what proved to be the winner, turning in an excellent cross from Branislav Ivanovic and leaving Per Cech with no chance. The Chelsea striker was substituted after 70 minutes, but his work was done. He's definitely public enemy number one with Arsenal fans. And most on Twitter. https://twitter.com/medavis6_/status/691299892958855168?ref_src=twsrc%5Etfw https://twitter.com/RodneyMarsh10/status/691294649252716544?ref_src=twsrc%5Etfw https://twitter.com/BBCSporf/status/691299664541388801?ref_src=twsrc%5Etfw https://twitter.com/andygoldstein05/status/691294395145019392?ref_src=twsrc%5Etfw https://twitter.com/piersmorgan/status/691310569291407361 https://twitter.com/piersmorgan/status/691294194665705472 https://twitter.com/arseblog/status/691296686556188672?ref_src=twsrc%5Etfw https://twitter.com/BishBlueHammer/status/691295859795824640?ref_src=twsrc%5Etfw https://twitter.com/DJTrevorNelson/status/691318165528301569 https://twitter.com/Ladbrokes/status/691311930536038400 https://twitter.com/philmcnulty/status/691310585561112576 https://twitter.com/bootifulgame/status/691310358745726976 https://twitter.com/Squawka/status/691296881339670528