Wolves forward Raul Jimenez has been included in Mexico's World Cup squad, despite not having played for his club since August.
The 31-year-old, who has been sidelined with a groin injury, has made four Wolves appearances this season.
Julen Lopetegui, the new Wolves boss, says he respects the player's decision but is still "worried".
"The most important thing is not the World Cup, it's Wolves," Lopetegui said on Monday.
Jimenez spent three weeks in Mexico last month as part of his rehabilitation and was named on the bench for their friendly match against Iraq last Wednesday, which Wolves were reportedly unhappy about.