Bucks coach Mike Budenholzer expressed cautious optimism regarding the status of Giannis Antetokounmpo after the two-time MVP left Milwaukee’s Eastern Conference playoff opener with a bruised lower back.

Antetokounmpo isn’t the only prominent player already dealing with a health issue after the first weekend of the playoffs. Injuries to some of the NBA’s top stars have dimmed the start of the postseason, with title hopes possibly fading just as quickly depending on how bad they’re hurt.

Budenholzer said Monday that Antetokounmpo underwent an MRI after the game that revealed “everything’s clean.” The Bucks lost 130-117 to the Miami Heat on Sunday and trail the best-of-7 series 1-0 heading into Game 2 on Wednesday night.

“I would say he’s still sore, but I think progress,” Budenholzer said. “He’s getting some treatment. I think we’ll just continue to monitor him for the next day or two. We’re probably fortunate that (we have) two days between games. I think (we’re) still mostly positive, mostly optimistic, but we’ll see how he feels over the next day or two.”

Injuries over the span of a couple hours Sunday also sidelined two-time All-Star Ja Morant of the Memphis Grizzlies and the Miami Heat’s Tyler Herro, keeping them from finishing their playoff openers.

Morant came into Sunday’s first-round Western Conference series with his right hand already bandaged after being hurt in a win that clinched the No. 2 seed for the Grizzlies.

Then he drove to the basket against the 6-foot-10 Davis with 5:48 left, with Memphis trailing the Lakers 105-101. His right hand appeared to bend the wrong direction as he hit the court. Morant writhed in pain, then ran toward the Grizzlies’ bench letting out a yell near midcourt before sprinting to the locker room.

Memphis coach Taylor Jenkins said X-rays were negative and the Grizzlies will do further testing taking this injury one day at a time.

“I’m not the medical expert,” Jenkins said.

Anthony Davis scared Los Angeles Lakers fans by grabbing at his right shoulder and saying he couldn’t move his arm. Luckily for the Lakers, Davis rebounded from a stinger and returned for the start of the third quarter of their 128-112 victory over the Grizzlies.

Both Antetokounmpo and Morant were hurt on drives to the basket where each landed awkwardly.

Antetokounmpo came down hard on his backside after being fouled by Miami’s Kevin Love. The Bucks’ forward got up slowly with 4:13 left in the first quarter. He picked up his second foul about 2 1/2 minutes later but played about 11 minutes for the Eastern Conference’s No. 1 seed.

The Bucks went on to lose 130-117 to Miami. Herro broke his right hand late in the second quarter, apparently while diving for a loose ball. The Heat disclosed the severity of his injury at halftime.

Miami coach Erik Spoelstra said Herro, seen with a cast on his hand after the game, won’t play Game 2 on Wednesday night and the Heat will figure out what to do next.