Thomas Partey has said Arsenal have only seen him at 100% two times since he arrived in England.
The Ghana midfielder joined the Gunners last summer in a £45 million ($58m) deal from Atlético Madrid.
But Partey has been plagued with a number of injuries since he arrived at the Emirates, which have limited him to just 16 appearances in all competitions so far.
When asked, ahead of Thursday’s Europa League last-16 first-leg tie against Olympiacos, whether Arsenal have seen him at 100 per cent yet, the Gunners midfielder said: “Yes, I had a few games.
“I think against [Manchester] United at their home and against Wolves [away] also I was able to show what I can do.
“Due to less games and less training, I think I have to keep working, keep trying to get back to that level again.”