Sunderland face Burton Albion tomorrow at The Stadium of Light in what is set to be their biggest game of the season so far.
If they lose to Burton tomorrow, then they are all but relegated to League One but if Chris Coleman's side can pick up three points, they still retain a hope of staying up this season.
The Black Cats have been boosted by the return of three defenders ahead of their run-in.
John O'Shea is back in training and available for selection and full backs Adam Matthews and Billy Jones are also in contention for this vital Championship clash.
However, Chris Coleman will be without some of his key players for tomorrow's match.
There are four new players who are not fit enough to be considered for selection and they join long term absentees Duncan Watmore, Tyias Browning and Jonny Williams on the injury list.
Here are the four players who will miss out on tomorrow's game through injury.
Oviedo limped off after 48 minutes against Reading last weekend.
The Costa Rican will not be available this weekend, although it is unclear as to how serious his injury is.
Sunderland will be boosted by the return of full backs Adam Matthews and Billy Jones to fill the void left by the 28-year-old.
Donald Love is another full back who will miss out.
The 23-year-old played the full 90 minutes against Reading, his 14th game of the season, but he will not be available for the Burton clash.
The former Manchester United defender will not feature again this season, according to Coleman.
Joel Asoro appeared as a substitute against Reading but then limped off.
The Sweden youth international has not recovered well enough to feature in tomorrow's fixture at home to Burton.
With two goals to his name this season, Sunderland will be hoping to have the impressive 18-year-old striker available for the last two games.
Sunderland are also without Lynden Gooch, who missed the Reading game last weekend.
The USA international has been a standout performer in Sunderland's midfield this year and his absence is a major blow for Coleman's side ahead of the final three games.
The 22-year-old will not feature again this season.