The Golden State Warriors' frontcourt has taken a concerning hit before training camp has even officially tipped off.

Star center Kristaps Porzingis has been ruled out indefinitely to open training camp due to an unspecified health issue, according to a team announcement reported by The Athletic's Anthony Slater.

The setback comes at an immediate cost to Golden State's preparation, as the 7-foot-2 big man will not travel with the team to Hawaii for the start of camp and early preseason preparations.

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The Warriors have not disclosed the exact nature of Porzingis' health issue or provided a timeline for his return. His absence creates an early question for Golden State's frontcourt rotation, with Draymond Green and Al Horford among the team's available veteran bigs.

Porzingis joined the Warriors during the offseason after spending the previous season with the Atlanta Hawks. The 30-year-old center has dealt with several injury setbacks throughout his NBA career.