Arsenal are facing the prospect of being without Spain midfielder Santi Cazorla for the rest of the season.
Cazorla made the last of his 11 appearances this term in October's 6-0 Champions League win over Ludogorets, when he took a kick to his Achilles.
The 32-year-old's ankle condition did not improve and he underwent surgery in December, with an initial prognosis of a three-month absence.
Arsenal are not in a position to confirm whether Cazorla's latest setback means he will not feature before the end of the current campaign, but it is understood the ex-Villarreal man's new target is pre-season ahead of 2017-18.
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