Dummett and Dwight Gayle limped out of last weekend’s 1-1 draw against Wolverhampton Wanderers at Molienux with hamstring injuries.
Asked about the injuries, head coach Steve Bruce today said: “Not great. Dummy looks a particularly nasty one. Dwight looks like a normal one between four weeks and six weeks.
“Dummy will have a second opinion on his.”
Meanwhile, Bruce will have Allan Saint-Maximin back for tomorrow’s home game against Chelsea.