Arsenal suffered a major injury blow when Hector Bellerin was stretchered off inside the final 20 minutes of the Gunners' Premier League game at home to Chelsea on Saturday.
The hosts were leading their London rivals 2-0 when Bellerin's knee appeared to give way as he went into a challenge with Ross Barkley and Marcos Alonso.
James Olley of the London Evening Standard noted the cruel timing of the injury while also speculating about its nature and extent:
James OlleyBellerin only returned to the starting line-up for the first time today since a calf injury on December 16.