Mikel Arteta admitted his “heart almost stopped” as Arsenal rode out a nerve-jangling end against 10-man Chelsea to record a 2-1 win and pass another major examination of their Premier League title credentials.William Saliba opened the scoring from a corner midway through the first half at the Emirates Stadium only for Piero Hincapie to put through his own net.Jurrien Timber restored Arsenal’s advantage in the second half, again from a corner, and Chelsea’s Pedro Neto was dismissed just four minutes later.