Spanish giants Atletico Madrid midfielder have confirmed Ghanaian midfielder Thomas Partey has suffered a thigh strain.
A statement on club's website confirmed: "The midfielder Thomas Teye Partey was unable to complete the morning's [Tuesday] training session and retired before it was over.
"After undergoing a first examination in Majadahonda's Fremap Clinic, the medical report of Atletico's midfielder indicates that he suffers a grade I injury of the vastus medialis muscle in the right thigh."
This is major setback for the 22-year-old who has broken into the Atletico Madrid first team squad.
He has made 13 appearances in 2015-16 and scored two goals, including the winner in Atletico's 1-0 victory over Levante last month.
Partey remains a doubt for Sunday visit to Getafe in the La Liga.