Alex Oxlade-Chamberlain will miss Arsenal’s trip to Manchester United and could face a longer spell on the sidelines.
The 22-year-old Arsenal midfielder suffered suspected knee and ankle damage in the 2-0 Champions League defeat by the Spanish giants.
There are fears that the England international faces a lengthy spell on the sidelines, meaning he would miss the friendly matches against Germany and Holland next month.
But Gunners manager Arsene Wenger has so far only ruled him out of Sunday’s trip to Manchester United.
Speaking to the club website, Wenger said: “He has a scan today (Thursday), he will not be available for Sunday.”
Defender Gabriel is set to return to training on Friday following a hamstring injury and could be involved at Old Trafford.
“He is coming back into the squad tomorrow, so we will see how he responds to that, but the signs are positive,” added Wenger. “He might be available for Sunday.”
Midfielders Jack Wilshere, Santi Cazorla and Tomas Rosicky remain sidelined for the United clash.