Arsenal are reportedly favourites to sign Real Sociedad midfielder Martin Zubimendi, who Kieran Tierney has recently hailed as ‘world-class. The La Liga maestro has been linked with a move to Arsenal for some time, with reports in January suggesting that the Gunners would activate Zubimendi’s £52m release clause. However, as we know, Mikel Arteta’s side made no so much, though the odds of Arsenal moving for Zubimendi in the summer now seem likely, with a midfielder on the agenda for the north London side. Arsenal now favourites to sign Real Sociedad star Martin ZubimendiAccording to journalist…