The defender pulled up in training before the two sides Europa League clash.
The Barcelona striker scored a wonder goal as his side knocked the Gunners out of the Champions League.
Four dogs became seriously ill with at least one dying in first UK babesiosis outbreak as experts blame relaxation of pet travel rules
Mesut Ozil failed to impress at the Nou Camp for Arsenal with the Gunners exiting the Champions League.
Liverpool defender Martin Skrtel made his comeback from injury... and was sent off.
Pundit felt Arsenal played well in defeat to Barcelona.
Arsenal made changes to the side which lost 3-1 to Barcelona.
Liverpool boss Jurgen Klopp led the Reds out for a training session at the home of Manchester United.
Tottenham boss Mauricio Pochettino hopes to have both players available.
The manager has been out of work since leaving Chelsea, but is expected to take charge at Manchester United.