All the latest injury updates ahead of Watford's trip to the Stadium of Light on Saturday.
Three wins in four matches had lifted spirits on Wearside, but this has been a poor week for David Moyes and his side.
A 3-0 defeat at fellow strugglers Swansea last weekend was followed by a slightly more forgivable reverse against Chelsea on Wednesday, results which mean Sunderland are again propping up the Premier League going into the weekend's fixtures.
Sunderland manager David Moyes
Quoted by the club's official Twitter account, David Moyes has provided an update on the fitness of his squad ahead of Saturday's clash with Watford, with some players still awaiting late fitness tests.
Sunderland AFC (@SunderlandAFC) December 16, 2016
Moyes also confirmed that he will be without the services of midfielder Jan Kirchoff, who picked up a knock against the Blues.
"Jan Kirchhoff is out. He has suffered a cartilage tear in Wednesday's match. As yet though there is no time frame," Moyes said.
Sunderland's Jan Kirchhoff receives medical attention
The Black Cats are currently four points adrift of safety and face a tricky away double header over the festive season; Moyes' side head to Old Trafford on Boxing Day before travelling to face Burnley on New Year's Eve.
Watford have injury problems of their own, with Walter Mazzarri confirming to the club's official website that Roberto Pereyra will be unavailable for the trip to the north-east after picking up a knock in the midweek defeat at Manchester City.
Watford's Roberto Pereyra in action with Burnley's Steven Defour
The Italian described the injury as "not terrible, not minor", and Pereyra will be joined on the sidelines by Stefano Okaka, Adrian Mariappa and Craig Catchart, who has returned to light training but is not yet ready to make his first-team return.
Defender Younes Kaboul - who made 24 Premier League appearances in his solitary season as a Sunderland player last time out - is fit to line up against his former employers having made his return to the matchday squad at the Etihad.
Stoke City's Xherdan Shaqiri in action with Watford's Younes Kaboul
Three defeats in four matches have seen the Hornets drop into the bottom half ahead of Saturday's match, with Mazzarri's men set to face Crystal Palace and Tottenham at Vicarage Road over the festive season.
What will the score be at the Stadium of Light? Leave your predictions below.
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