The report stresses that Arsenal and Gyokeres’ camp presented a deal that guaranteed Sporting a fixed sum of €70million (£60.8m) plus €10m (£6.95m) in add-ons. However, the dialogue between the three parties hit a roadblock on Monday and negotiations are ‘at risk of collapsing completely’.

All the latest transfer news as Arsenal agree terms with defender Cristhian Mosquera, plus the latest on Viktor Gyokeres and Morgan Gibbs-White.

Sporting CP president Frederico Varandas has emphatically revealed that his wantaway striker Viktor Gyökeres will be served with a “heavy fine” and forced to apologise to his teammates after missing the start of pre-season training in an attempt to accelerate his exit this summer.