United States Men’s National Team midfielder Weston McKennie is dealing with a quadriceps injury that could put his participation in next month’s World Cup opener in jeopardy.

McKennie, who is an integral part of the USMNT core with forward Christian Pulisic and defender Sergino Dest, left Saturday’s game for Juventus at halftime and did not return.

While the injury was given a timetable of 15 days for a return, a setback in his recovery could limit his participation for the Nov. 21 World Cup opener against Wales at Qatar. The USMNT is returning to the World Cup after it did not qualify in 2018.

The group stage also has the USMNT scheduled to play England and Iran, with the top two teams in the group advancing to the knockout stage.

Other injury concerns include midfielder Luca de la Torre (hamstring) and goalkeeper Matt Turner (groin). Midfielder Tyler Adams had been dealing with an undisclosed injury but returned Saturday as Leeds United earned a 2-1 victory over Liverpool.

Others dealing with nagging injuries include Gio Reyna (hamstring), Antonee Robinson (ankle), Timothy Weah (ankle), Yunus Musah (groin) and Zack Steffen (knee).

–Field Level Media