Norwich City boss Dean Smith admits injuries are a growing concern after defeat to Manchester United.
The Canaries were already without a number of players due to injury issues and lost captain Grant Hanley after 21 minutes with a left shoulder problem.
Smith's side host Aston Villa, the manager's former club, on Tuesday and face a crisis at the heart of defence.
"Grant landed on his shoulder and had to come off," the Norwich boss said.
"He is a warrior so we knew when he stayed down it was a problem. Gibbo (Ben Gibson) pulled out with a tight thigh on Friday and Andrew (Omobamidele) has a stiff back.
"We are down to the bare bones but Jacob Sorensen put in a good performance (at centre-back).
"He dealt with them (Ronaldo and Marcus Rashford) really well and I was really pleased for him and with him."
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