Mikel Arteta admitted Thomas Partey has struggled at times during his first season at Arsenal, as injuries have interrupted the midfielder's rhythm.
Partey missed nearly a month with a thigh injury before making his return in December, only to suffer a new injury and be forced out another month.
Arteta, though, believes Partey is now close to his best after returning from his injury struggles.
Asked if he thought Partey was getting close to his best, Arteta said: “I think so.
“Rhythm-wise he has struggled a little bit in the last few weeks because he hasn’t had enough training sessions or enough preparation because the league is so demanding.
“But you can see his quality, you can see the presence and the special qualities he provides to the team when he is on the pitch.
“I think it is just a fact of playing more games, getting some chemistry and understanding with his team-mates and getting as fit as he possibly can.”
Partey joined the Gunners from Atletico Madrid for £45 million ($62m) on transfer deadline day in October, and was expected to be a key part of Arteta's midfield.
Due to his aforementioned injury issues, however, the 27-year-old has started just 10 of the team's 23 Premier League games since he joined.
Arsenal have failed to live up to expectations in 2020-21, currently sitting in 10th place in the league. They will take on their north London rivals Tottenham on Sunday before facing Olimpiacos on Thursday in their last-16 second leg.