City striker Sergio Aguero thought he had put his side ahead in the FA Cup semi-final, as did Raheem Sterling when he followed up on Aguero's strike, only for Wembley officials to award the Gunners a goal kick.
The linesman adjudged the ball to have gone out of play when Leroy Sane crossed to Aguero, ruling out the Argentinian's strike minutes before half time.
Enraged, City supporters aimed fire at the referee and his team on Twitter.
Perfectly normal goal disallowed. Shocking officiating this. It is called The Emirates FA Cup! pic.twitter.com/oc8kP1ngTf— City Chief ️ (@City_Chief) April 23, 2017
Aguero scored. Sterling scored. Aguero penalty.#IfVARExisted— Everything City (@Everything_City) April 23, 2017
To those at Wembley not seeing replays: Aguero's shot was a goal. Lino flagged (wrongly) for Sane's cross going out. Replay shows it didn't!— WendyWoo (@wendy1704) April 23, 2017
Manchester City have had a rightful goal disallowed at Wembley. pic.twitter.com/UMPGBjgdpw— Adam Joseph (@AdamJosephSport) April 23, 2017