However, the Portuguese giants are now demanding €70m (£60m/$82m) as the fixed amount and the remaining €10m (£9m/$12m) in add-ons. If Sporting stick to their stance, there is a good chance that Arsenal will ultimately end their pursuit of the 27-year-old forward.

Arsenal 's moves for Sporting CP's Viktor Gyokeres and Chelsea 's Noni Madueke could reportedly collapse. The Gunners are unwilling to match the asking prices set by the two players' respective clubs even after agreeing personal terms with both.

Viktor Gyokeres is worried being stuck in limbo after seeing Sporting CP and Arsenal fail to reach terms over his transfer fee on Tuesday.