Boro boss Aitor Karanka has a selection dilemma to contend with before naming his side to play West Ham on Saturday.
Middlesbrough beat Sunderland 2-1 in the Wear-Tees derby for the first time in the Premier League since 2006.
The Uruguayan striker has been called up by his country despite only recently returning from injury.
The Uruguayan international will head to the Riverside Stadium, after bidding farewell to his colleagues at Espanyol next week.
Middlesbrough have agreed a deal with Espanyol to sign Uruguay striker Christian Stuani, HITC Sport understands.
Middlesbrough have been tracking Espanyol attacker Christian Stuani.
Middlesbrough are reported to be closing in on a deal to sign Christian Stuani.
Middlesbrough are attempting to sign Espanyol’s Christian Stuani, reports claim.