Arsenal have been linked with a move for Sporting Club De Portugal striker Viktor Gyokeres, but a summer transfer will not be easy. The Swedish forward has been sensational since his move to Lisbon from Coventry City, scoring 36 and assisting 14 times in 39 games across all competitions, as Europe’s deadliest marksman. Gyokeres has now been linked with Arsenal among other clubs, with Mikel Arteta interested in strengthening his attacking options. The 25-year-old has a €100m (£86m) release clause in his contract, meaning that whilst he may not be totally unaffordable for Arsenal, he will come w…