Arsenal manager Mikel Arteta outmanoeuvred his mentor Pep Guardiola as the Gunners reached the FA Cup final with victory at Wembley.
Arteta, who left his job as Manchester City assistant manager to succeed Unai Emery at Arsenal in December, now has a chance to mark his first season in charge with major silverware when they face Chelsea or Manchester United in final.
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The match-winner was Pierre-Emerick Aubameyang, the world-class striker Arsenal are desperate to secure on a new long-term contract, as he ruthlessly exposed City’s defensive deficiencies.
Aubameyang had already shot straight at Ederson with one clear chance but there was no escape for City after 19 minutes when he showed great technique to steer home Nicolas Pepe’s cross with the outside of his foot at the far post.
Man City dominated possession after the break but squandered their opportunities and Aubameyang made them pay once more in the 71st minute when he raced away on the angle to slide a composed finish under the keeper.