Arsenal survived a massive scare in their pursuit of the Premier League title as they came back from two goals down to beat Bournemouth 3-2 with a last-gasp winner from Reiss Nelson, in a rip-roaring contest in north London on Saturday. Relegation-threatened Bournemouth scored the second-quickest Premier League goal of all time after nine seconds of play through Philip Billing, and despite Arsenal’s domination, Marcos Senesi made it 2-0 for the visitors before the hour.