West Ham completed a deal earlier on deadline day to sign Arsenal forward Lucas Perez.
Arsenal signed Perez from Deportivo La Coruna in 2016 but he struggled for game time at The Emirates.
He impressed particularly in his first few months for the Gunners, which saw him score a hat-trick in the Champions League.
The Mirror report West Ham have paid just £4 million for the forward.
The 29-year-old has signed a three year deal with the Hammers.
The deal could prove to be a bargain for West Ham and Perez's departure has caused some frustration among Arsenal fans.
He showed promise despite never getting a proper chance, while other players continue to get opportunities despite failing to seize them, with Danny Welbeck and Alex Iwobi two names mentioned by supporters.
Hopes of a rejuvenation under new boss Unai Emery have been dashed and Perez is beginning a new adventure in East London.
Here is a look at how Arsenal supporters reacted on Twitter to Perez's departure...
Disgusted. Was so unfairly treated. We are going to regret this— Ricky (@HarisonRamon) August 9, 2018
I feel so bad for him Wenger never gave him the chance whenever he played he was a superstar I will miss him❤️— AUBAZETTE❤️ (@dwishank) August 9, 2018
This guy wasn’t given the chance he deserved— Daniel Eaglesfield (@DEaglesfield) August 9, 2018
Lucas > Welbeck, iwobi— Adam COYG (@sztambel) August 9, 2018
Joke! Gave the likes of Iwobi a contract extension which was completely undeserved and this lad hasn’t even been given a chance— Aubameyang14 (@ManLikeAuba2018) August 9, 2018
Treated him poorly. Class striker. Needed him for Europa games— Joseph Petrassi (@JosephPetrassi) August 9, 2018
I don’t get why we never gave him a proper chance— ᴴᵉᶰᶜʰ¹⁴ #KroenkeOut (@MrThierryHenry) August 9, 2018
literally never got a chance for us, the signing of lucas was literally just to try and appease the fans. he’s a quality player and the icing on the cake if we keep welbeck over him ♂️— J (@arsenal_truth_) August 9, 2018