Brentford boss Thomas Frank admits they're investigating their injury crisis this season.

Frank says the issue has warranted an internal investigation.

"We certainly have too many injuries. We are looking into it. We will have to look at that," said Frank.

"We have an open dialogue with the medical staff. They are working hard to get the players back. We all want to minimise the risk of injury. We all want the same thing.

"We have had eight contact injuries, and Christian (Norgaard) is one more. We have been extremely unlucky."