Birmingham midfielder David Dunn says he owes Arsenal a debt of gratitude for rescuing his career from injury.
Hamstring problems hampered Dunn
Gunners physio Gary Lewin helped diagnose the cause of the midfielder's long-standing hamstring problems.
A grateful Dunn said: "We couldn't work out what it was and it says a lot about what sort of club Arsenal are, the way they were prepared to help me.
"People can say what they like about Arsenal but I won't hear a bad word said about them after what they did."
Arsenal physio Lewin has become an expert in treating hamstring problems, most notably through dealing with former Arsenal skipper Tony Adams.
Lewin provided Blues physio Neil McDiarmid with extensive details of the latest treatment methods used at Highbury.
Eventually, Dunn's hamstring problems were attributed to tension in his lower back.
Dunn said: "Having an injury like that is the hardest thing to come to terms with as a footballer. The most frustrating thing was that we couldn't work out what was causing it.
"The advice from Arsenal helped me get fit again and now I'm keeping my fingers crossed that I can stay healthy throughout this season and fulfil my potential.
"I had gone from knocking on the England door to being in a position where I didn't know what the future held for me.
"It's still a bit of a concern that it might flare up again but I feel I'm back now."