Arsenal have persistently flirted with moves for both Gyokeres and RB Leipzig's Benjamin Sesko this summer but if the ex-Coventry City hitman does not show up for training in Lisbon, there is optimism Sporting may crack and eventually, soften their stance.

Mikel Arteta is looking to make additions on the pitch, notably in midfield and up front, but the Gunners boss has also moved to bring in a former Manchester United defender to his team