Millwall's Nicky Bailey could miss up to a month of football after tearing his calf muscle over the weekend.
Bailey, who was making his first start of the season at Huddersfield Town after a different calf injury in August, won't be able to return until after the international break next month.
"Nicky has sustained a brand new tear to the right gastroc calf muscle which has an action in flexing the knee," Lions physio Bobby Bacic told the club website.
"The tear thankfully is minor and we expect to have him back training soon after the international break."
The earliest that the midfielder can return is the home match against Wolverhampton Wanderers on October 18.