Steve McClaren has just four fit defenders for Newcastle United's game against Watford.
Paul Dummett and Jack Colback have been ruled out of tomorrow's match through injury.
Colback had been due to fill in at left-back in place for Dummett, who suffered a hamstring injury against West Ham United last weekend.
But midfielder Colback is also unavailable because of a hamstring "niggle", according to head coach Steve McClaren, who has defensive quartet Fabricio Coloccini, Chancel Mbemba, Jamaal Lascelles and Daryl Janmaat available to play at Vicarage Road.
McClaren said: "Paul Dummett has a tight hamstring, but he should be back for the next game.
"Jack Colback's got a little niggle. We're not taking a risk."
McClaren also has defender Steven Taylor back from a long-term injury, though he is likely to be named on the bench.