At the outset of 2016–17 Cazorla was once again an important player for Arsenal, making 11 appearances and scoring twice, before he injured his right Achilles tendon during a Champions League fixture against Ludogorets Razgrad on 19 October 2016, sustaining the injury from a challenge while providing an assist for a Mesut Özil goal in the 6–0 victory.  Standard rehabilitation did not prove effective and in December it was confirmed that he would require surgery.  He eventually endured eight operations on the problem (the ankle originally having been damaged playing for Spain in 2013), and contracted gangrene on the affected area with the infection 'eating' part of the tendon. It had been feared that he could be unable to walk again or could even lose the affected leg.  The condition required antibiotic treatment and a skin graft, with the skin sourced from Cazorla's left forearm where a tattoo of his daughter's name had featured.  He temporarily relocated to Salamanca to complete a further recovery programme, with the aim of returning to play football in 2018; after further operations, however, this was revised to 2019.