LOS ANGELES (AFP) — Giannis Antetokounmpo suffered a calf injury as the Milwaukee Bucks defeated the Boston Celtics while the Golden State Warriors outgunned the Los Angeles Lakers in their crucial heavyweight showdown.

Former National Basketball Association Most Valuable Player Antetokounmpo crumpled to the court in a non-contact incident in the third quarter of the Bucks' 104-91 defeat of Boston after in-bounding to teammate Damian Lillard.

Antetokounmpo, who missed games last month with an Achilles injury, hobbled off the court in clear discomfort and did not return to the game at Milwaukee's Fiserv Forum.

The Bucks said Antetokounmpo had suffered a left soleus strain and would get an MRI scan to assess the injury.

"They're checking him now," a downcast Milwaukee coach Doc Rivers said when quizzed on Antetokounmpo's injury after the win.

Asked what level of concern there was about Antetokounmpo's injury, Rivers replied: "Good question. High, I would say that. He's Giannis."

"I think everyone probably feels the same way as I do right now. So, we're just going to hope for the best."

Any significant injury to Antetokounmpo would be a brutal blow to the Bucks' hopes of making a deep run in the playoffs.

The Greek star had scored 15 points with eight rebounds and seven assists before leaving Tuesday's game.