Nico Gonzalez is facing a spell on the sidelines after suffering a fractured metatarsal during Valencia's 2-1 LaLiga defeat to Villarreal on New Year's Eve.
The midfielder, who joined Valencia on a season-long loan deal from Barcelona in August, did the damage in the second half of Saturday's game.
On New Year's Day, Valencia revealed the extent of the damage Nico has sustained.
The club said in a statement: "Nico Gonzalez has been diagnosed with a fracture of his fifth left metatarsal, suffered in the LaLiga game against Villarreal CF.
"The player and the Valencia CF medical team will assess treatment options for the injury."
Nico, who turns 21 on Tuesday, has made 13 LaLiga appearances for Gennaro Gattuso's side this season, with just six of those coming as a starter.
He signed a long-term deal with Barca before making a temporary move to their LaLiga rivals.