By Josh O’Brien Arsenal boss Mikel Arteta already thinks highly of Real Sociedad star Martin Zubimendi, but may sit up and take note of comments made by the Gunners’ very own Kieran Tierney. Scotland ace Tierney is still on the books at Arsenal, but currently spending the season out on loan with La Liga outfit Real Sociedad. Having seen so much of his time at the Emirates plagued with fitness issues, the former Celtic star is hoping some time in San Sebastian can kickstart his career. It is during this time with Sociedad that Tierney has been able to get an up close look at one player Arsenal …