Warnock has named a handful of players who will feature in the second-round tie, while new Boro signing Sam Morsy is set to make his debut after arriving from Wigan.
Our Boro writer Joe Nicholson has picked the side he thinks will start against the Tykes – scroll down and flick though our picture gallery to see if you agree:
9. RW: Marcus Tavernier
Has been started on the bench for two successive games. Boro have missed his pace and energy. Photo: James Chance
10. LW: Ravel Morrison
Left out against Luton after making his debut against Wigan. Could help provide some creativity in the final third. Photo: Nathan Stirk
11. ST: Ashley Fletcher
Hasn't made as much of an impact with another striker alongside him in recent weeks. Boro's top scorer with 10 goals this season. Photo: Jan Kruger