Moritz Leitner will miss the next four weeks after suffering a hamstring injury against Hull City on Saturday.
Leitner limped off in the first-half of the defeat to Hull, and Daniel Farke told the media on Monday lunchtime that a scan has revealed some blood in the hamstring.
“Moritz Leitner got a hit and he overstretched his leg and has a hamstring injury, with blood in the hamstring,” Farke said. “The first diagnosis is we’ll have to do without him for four weeks. Hopefully he can return pretty soon after the international break.”
Nelson Oliveira is also ruled out after suffering a calf problem in the second half of the game against Hull.
“We’ll have to do without Nelson Oliveira for two weeks because he has problems with his calf,” Farke said. “It’s a strain, but there’s no blood in the calf. We’ll have to do without him for the next two games.”
There are also issues in City’s midfield, with Alex Tettey struggling with the load and Harrison Reed suffering from illness.
“We have to be careful with Alex because he doesn’t feel 100% comfortable with his knee. It’s not a new injury but we have to be careful with his load – three games in a week is a big load – and also if he was booked tomorrow he would be banned for the next two games, so we have to make a decision tomorrow.
“Harrison is ill. He has a temperature, and we might have to ask him to travel individually but it’s doubtful he’ll be available at the moment, so I will have to make a late decision.”
Farke also revealed that Christoph Zimmermann is also a doubt after losing 6kg in six days due to illness, but Sean Raggett will travel with the squad to Barnsley.
“This afternoon will be the first time Christoph will be able to train with us, so it’s doubtful that he’ll be available,” Farke said.
“Sean will travel with us, as it’s important to strengthen our defence behaviour. He’s always there with a great attitude, but it’s a bit risky because he’s never played in a three-man backline. And when you have Timm Klose and Grant Hanley as options for a two-man centre-back formation, and when Christoph is available, it can be difficult for Sean.
“But I’m pleased with his development and his attitude on the training pitch.”