Boston Celtics combo guard Marcus Smart is out indefinitely for Team USA with calf tightness, according to Marc Stein of The New York Times.

Smart will be re-evaluated next week. This probably means the Celtics guard won't make the 12-man roster which will compete at the FIBA World Cup in China:

Marcus Smart had a sore ankle on Tuesday and took himself out of Team USA practice as a precaution. The Celtics and their medical staff will be in touch with Smart while he's in Las Vegas.

Last season, Smart averaged 8.9 points, 2.9 rebounds and 4.0 assists for the Celtics while shooting 42.2 percent from the field, 36.4 percent from beyond the arc and 80.6 percent from the free-throw line. He’s joined in Las Vegas by Celtics teammates Kemba Walker, Jayson Tatum and Jaylen Brown. The four went out to dinner on Sunday.

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A newspaper as the background, Jayson Tatum and Jaylen Brown with the Philadelphia 76ers, Miami Heat, Chicago Bulls, and Atlanta Hawks logos in the background

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Representing your country is great, but these guys aren't getting paid to play for Team USA. After what happened to Paul George in the summer of 2014, teams are always going to be a little anxious watching their players compete for Team USA.

Seeing a player get hurt when he's not playing for the club that is paying him is always a tough scene.