Birmingham manager Chris Davies makes three changes from the last League One match, a 2-1 win over Rotherham a week ago. Bailey Peacock-Farrell, Marc Leonard and Scott Wright come in for Ryan Allsop, Taylor Gardner-Hickman and Lyndon Dykes.
Eddie Howe has made nine changes to the side that beat Arsenal in the Carabao Cup semi-final. Dan Burn and Bruno Guimaraes are the men who keep their place, but there are plenty of big hitters on the bench including Alexander Isak.
Birmingham (3-5-2) Peacock-Farrell; Klarer, Davies, Cochrane; Laird, Dowell, Iwata, Leonard, Anderson; Wright, Stansfield.
Substitutes: Allsop, Bielik, Hanley, Sampsted, Harris, Willumsson, Dykes,
May, Jutkiewicz.
Newcastle (4-3-3) Pope; Livramento, Krafth, Burn, Targett; Miley, Guimaraes, Longstaff; Osula, Wilson, Willock.
Substitutes: Dubravka, Ruddy, Trippier, Schar, Tonali, Isak, Hall, Murphy, Neave.
Referee Matthew Donohue (Lancashire)