The Teessiders have picked up just one point from their last five games, with Warnock admitting there are some players who want to leave the club.
With four games remaining, the Boro boss will therefore be assessing his squad as he looks at the areas he needs to strengthen for the 2021/22 campaign.
Warnock’s former side Rotherham are in desperate need of points as they look to avoid relegation from the Championship.
The Millers are four points from safety with six games left to play after losing their last two games against Coventry and Birmingham.
Paul Warne’s side shouldn’t be taken lightly, though, after beating Boro 3-0 at the Riverside earlier in the season.
Here’s the Boro side we think could start against Rotherham.
1. GK: Jordan Archer
Set to receive another chance in goal as he looks to earn a new contract for next season. Photo: Alex Burstow
2. RB: Darnell Fisher
Was substituted with a knock against QPR but the issue isn't thought to be serious. Photo: Catherine Ivill
3. CB: Grant Hall
Continues to impress at the heart of Boro's defence despite Boro's poor form. Photo: Stu Forster
4. CB: Paddy McNair
Has played in defence for most of the season and continues to play at the back due to Dael Fry's injury. Photo: Alex Pantling