According to reports, Arsenal's technical director Andrea Berta and his team left Lisbon after two days of negotiations without reaching a deal. Gyokeres, who is waiting to see how the situation unfolds, is now concerned that his transfer to Arsenal might not happen.
Gyokeres' representatives had previously agreed on personal terms with Arsenal last month. However, it seems that the two clubs have a significant difference in their expectations regarding the transfer fee.
It appears that Arsenal are willing to pay around £50-60 million for Gyokeres, but Sporting CP is insisting on a higher amount, estimated to be between £75-80 million.