Central to Gyökeres’s frustrations is a belief that he had an agreement with Sporting president Frederico Varandas to sell him for a certain fee, believed to be around €70 million (£60.4 million, $82 million). Varandas has publicly insisted Gyökeres will not be sold for such a price.

Indeed, Arteta has been vocal about the importance of wanting players to have certain standards of professionalism. Several years ago, Arteta told reporters, as per Goal.com: “I

Manchester United have been consistently linked with a move for Sporting striker Viktor Gyokeres during the summer transfer window

Manchester United have reportedly been given fresh hope of signing Viktor Gyokeres as Arsenal continue to face difficulties in the pursuit of their top striker target

With Arsenal in advanced talks to sign Gyokeres, we analyse his strengths and style, and how it might work out for him in the Premier League

Sporting CP striker Viktor Gyokeres "remains open" to a move to Man Utd with a potential move to Arsenal stalling, according to reports.

Transfer news LIVE!Arsenal, Chelsea and Manchester United all continue to push for huge signings as the summer transfer window kicks into gear. The Gunners are in advanced talks over a blockbuster move for Viktor Gyokeres and are said to have submitted an opening bid for Chelsea winger Noni Madueke.

Gyökeres’s final home outing under Amorim’s watch saw him plunder a hat-trick against Manchester City in the Champions League. The defending Portuguese champions were unbeaten across all competitions at the time Amorim was poached by United.