Atletico Madrid are sweating on the fitness of Tiago after the midfielder finished their 1-0 win over PSV Eindhoven unable to run on Tuesday night, reports AS.
Tiago missed almost all of last season with a broken leg and now looks set for another stint on the sidelines through injury.
The 35-year-old pulled up with a suspected thigh injury with minutes remaining of their win over PSV and is now set for medical tests.
Tiago has the highest pass success rate of any Atletico player in La Liga this season (97.2%).
For more stats on Tiago, click here to visit his WhoScored player page