Arsenal manager Arsene Wenger has claimed that the club are no closer to discovering the reasons behind Aaron Ramsey's muscular problems.
The Wales international will miss Sunday's FA Cup fifth-round tie against Middlesbrough with a hamstring problem - his third of the season.
In this morning's press conference, Wenger said: "We haven't found an underlying reason. There's certainly a medical or biomechanical [reason] because he's a guy who is serious, works hard and has a controlled, disciplined life. There's no obvious reason why he has muscular problems."
Ramsey joined the Gunners in 2008 from Cardiff City.
