Laurent Koscielny has hailed the departing Aaron Ramsey for showing a professionalism and a fighting spirit that some of his former Arsenal team-mates have lacked.

Ramsey, who will join Juventus on a free transfer this summer, will not play for Arsenal again after further tests revealed his hamstring injury to be far worse than feared.

His absence from both legs of Arsenal’s Europa League semi-final against Valencia represents a considerable blow for Unai Emery, who must find a way to end an alarming run of three consecutive defeats without his most dynamic midfielder.

Arsenal are now working alongside medical staff at Juventus in treating Ramsey, with the hope of ensuring the Welshman is fit enough to start pre-season in Italy as planned.

“What I like about Aaron is that we know he signs for Juventus but he is still a professional and he always fights for the club and for the team,” said Koscielny, the club captain.

“Sometimes you have players who have stopped fighting for this team, but I think he has loved this club and that is why he stayed at 100 per cent for us. It shows a great mentality and character.”