Arsenal completed a dramatic comeback at Bournemouth as they rescued a point in injury time having fallen 3-0 behind. The Gunners looked destined for a third away league defeat in a row before a late rally that began with a diving Alexis Sanchez header and gathered momentum when a stunning Lucas Perez left-footed volley reduced the gap to a single goal. Bournemouth went down to 10 men when Simon Francis was sent off for a challenge on Aaron Ramsey and Arsenal capitalised as Olivier Giroud headed a 92nd-minute equaliser.