The summer transfer window rolls on as Premier League clubs and those around Europe look to add to their squads.Arsenal's negotiations for Sporting's Viktor Gyokeres have stalled over a difference in overall value and terms.

Arsenal in advanced talks to sign Sporting striker Viktor Gyokeres; no club-to-club agreement but there is a willingness from all parties to get a deal done; Arsenal are encouraged by the 27-year-olds desire to join;