Naylor was forced to be withdrawn from Saturday's 2-1 win over Derby County at Portman Road with just half an hour on the clock after picking up the injury and today had an injection in his knee to aid his recovery, however as a consquence of this, he is ruled out for the trip to The New Den.
Naylor Out of Millwall Clash
"Richard has a tight hamstring and it needs time to recover and loosen up," Town physio Dave Williams confirmed to the Official Club Website.
"But the pain that Richard experiences in his knees is putting stress on the hamstring and preventing it from easing up quickly.
"So he has had an injection in his knee that will in turn release the pressure on the hamstring and enable it to recover."
In Naylor's absence, it is likely that John McGreal will start his second game in a row alongside Georges Santos who returns from a one match ban that ruled him out of the victory against George Burley's Derby last week.
"But the pain that Richard experiences in his knees is putting stress on the hamstring and preventing it from easing up quickly.
"So he has had an injection in his knee that will in turn release the pressure on the hamstring and enable it to recover."
In Naylor's absence, it is likely that John McGreal will start his second game in a row alongside Georges Santos who returns from a one match ban that ruled him out of the victory against George Burley's Derby last week.