Middlesbrough face defensive dilemma
Middlesbrough head coach Aitor Karanka could be without three defenders for Saturday's FA Cup quarter-final clash with Manchester City.
Calum Chambers is still sidelined with a foot problem, and will be joined on the sidelines by Daniel Ayala, who limped off with a hamstring injury eight minutes into last weekend's 2-0 Premier League defeat at Stoke.
Karanka has also admitted full-back George Friend is likely to miss out after aggravating a calf injury which ruled him out last month, while midfielder Adlene Guedioura is ineligible having played for Watford earlier in the competition.
Provisional squad: Valdes, Guzan, Barragan, Fabio, Gibson, Espinosa, Husband, Fry, De Roon, Clayton, Forshaw, Leadbitter, Downing, Stuani, Traore, Fischer, Negredo, Gestede, Bamford.