Mikel Arteta wanted Arsenal to have wrapped up a move for Sporting CP striker Viktor Gyökeres before pre-season began.

Viktor Gyokeres is set to leave Sporting but his exit is becoming more and more bitter with the striker having now sent a legal letter to the club.

The Viktor Gyokeres transfer saga continues to rumble on, with Manchester United even supposedly trying their luck to hijack a move to Arsenal. The Gunners have been locked in negotiations with the Portuguese side for some time and were hopeful of striking a deal before their pre-season tour to Singapore.