Arsenal midfielder Santi Cazorla cannot give a timeline on his return from injury after undergoing a minor procedure on his right ankle on Thursday, after the scar from surgery in December opened when he was cycling.
The Spain international has not played since October 19 and was expected to rejoin the squad in the next few weeks.
'Everything was going well until I started to do some exercises on the bicycle and the stitches gave in,' Cazorla told Spanish radio station Onda Cero.
'I had to have a minor operation to close the scar on Thursday afternoon.