Alex Oxlade-Chamberlain could reportedly miss the next four weeks of action for Arsenal after suffering a hamstring injury against Manchester United on Monday night.
The England international was substituted in the second half of the Gunners' 2-1 victory over Louis van Gaal's side in their FA Cup quarter-final at Old Trafford.
According to the Daily Mail, following a scan, Arsenal are concerned that Oxlade-Chamberlain will be out of action for around a month, but further tests are required.
If so, the 21-year-old could miss games against West Ham United and Liverpool in the Premier League, as well as their crucial Champions League last-16 second leg against Monaco in France.
England matches against Lithuania and Italy could also be in doubt for the player.
