The Miami Heat lost starting guard Tyler Herro in the second quarter of Sunday's Game 1 against the Milwaukee Bucks after he suffered a broken hand.

The injury occurred late in the second quarter after the reigning Sixth Man of the Year had put up 12 points (five-of-nine shooting) in 19 minutes, landing awkwardly on his hand while diving for a loose ball in the final minute of the half.

Herro immediately began wincing in pain, but the ball found him open in the corner 20 seconds later in a position where he had to shoot. He air-balled the shot and signalled to the bench that he needed to be taken out.

Miami quickly announced that X-rays confirmed he had broken his hand and would take no further part in the game.

The 23-year-old is enjoying a terrific first season as a full-time starter, averaging 20.1 points, 5.4 rebounds and 4.2 assists while draining a career-high 3.0 three-pointers per game, shooting 37.8 per cent from deep and leading the league with a free throw percentage of 93.4.

It came after Bucks star Giannis Antetokounmpo exited the contest earlier in the second quarter following a hard fall onto his back, and was also ruled out for the remainder of Game 1.

#MIAvsMIL INJURY UPDATE: Tyler Herro (broken right hand) will not return to tonight’s game vs the Bucks.

— Miami HEAT (@MiamiHEAT) April 16, 2023