Jose, Arsene clash over Costa

Arsenal boss left fuming after 2-0 loss to archrival

Diego Costa provided the lightning conductor as the longstanding friction between Chelsea and Arsenal crackled to the fore during his side's ill-tempered 2-0 victory in the Premier League.

Costa sparked the incident, late in the first half, that culminated in the dismissal of Arsenal centerback Gabriel, who was goaded into kicking out at the Chelsea striker following a penalty-box scuffle involving Laurent Koscielny.