Newcastle United beat West Bromwich Albion 1-0 at St. James' Park at the weekend.
Doumbia was brought to Newcastle in the January transfer window, as McClaren looked to increase his side’s attacking threat.
There was an expectation that the striker would make his debut against the Baggies, but he remained on the substitutes’ bench throughout the entirety of the fixture.
And McClaren admits that decision was only taken, as he wanted to keep Aleksandar Mitrovic on the pitch to help his side defend set-pieces in the closing stages.
“He’s only trained a couple of days," McClaren said. "We wanted to throw him on (against West Brom) but we kept Mitro on for the set-plays.
“We’ve got a game on Monday so he’ll get some minutes."
Doumbia already faces a fight to win a place in Newcastle’s team, as Mitrovic seems to have responded to his arrival.
The Serbian has struggled for goals this season, but he notched the winner against the Baggies - making the Roma loanee’s task of breaking into the starting line-up even harder.
Doumbia’s debut for Newcastle could now come next weekend, when McClaren’s side face Chelsea at Stamford Bridge, looking to put more distance between themselves and the bottom three.