Ex-Arsenal striker Vela hits four in Real Sociedad win
The former Arsenal striker opened the scoring with less than six minutes on the clock but the visitors scored twice in the space of five minutes through Rafinha and Alex Lopez to take the lead into half-time.
Luis Enrique's side looked to have the points wrapped up when Rafinha struck again after 57 minutes but Vela pulled one back and the pendulum swung further towards the hosts when Celta midfielder Andreu Fontas was sent off for two bookable offences.
With an extra man and their home fans roaring la Real on, Vela scored two more goals in the space of three minutes to complete the comeback and bring the match to an extraordinary climax.
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