Derby boss Steve McClaren has revealed the full extent of the injury scare that forced Kalifa Cisse to miss the Sky Bet Championship win at Bournemouth.
Cisse was absent on Saturday after being rushed to hospital with an infected toe prior to the international break.
The 29-year-old spent a couple of days on an IV drip to get antibiotics into his system.
"Kalifa actually collapsed after the game against Sheffield Wednesday and was rushed to hospital. It's been a pretty nasty toe injury," McClaren told the Derby Telegraph.
Mali international midfielder Cisse, who has signed a short-term deal with the Rams until January, made his debut in the 3-0 home victory over the Owls earlier this month before the drama unfolded.
First-team coach Paul Simpson added: "We are hoping Cisse is over the worst of it now.
"He has had a really tough time but we're hoping he will be back in training this week and will give us a selection decision for the next game.
"He was ruled out for the Bournemouth game but, fortunately, we had a great replacement in John Eustace."
Eustace returned to the team following a one-match suspension for reaching five yellow cards.