Celtics center Kristaps Porzingis shoots over Miami Heat guard Jaime Jaquez Jr. during Game 4 of a first-round playoff series against the Miami Heat on April 29. Porzingis left because of an injury later in the game and hasn’t played since, but he’s nearing a return. Marta Lavandier/Associated Press

BOSTON — Whether injured Boston Celtics center Kristaps Porzingis will be ready in time for the start of the NBA Finals this week is still to be determined.

But signs are pointing to him being able to return to the court sooner rather than later during Boston’s matchup with the Dallas Mavericks.

The 7-footer hasn’t appeared in a game since sustaining a strained left calf in Game 4 of Boston’s first-round playoff series against Miami on April 29.

But 4-1 victories over the Heat and Cavaliers, followed by a 4-0 sweep of Indiana in the Eastern Conference finals, have given the Latvian extended recovery time.

Celtics Coach Joe Mazzulla has refrained from making predictions on when he expects Porzingis to be available. But he was clear that his team is better with Porzingis in the lineup, despite compiling a 9-1 record without him this postseason.

“When KP is at his best, he’s been tremendous for us, and we expect that from him and we know he’ll give that to us,” Mazzulla said.

Porzingis last spoke publicly on May 4, saying of the injury, “It’s something, it’s not nothing,” and adding that it would take “a little bit of time” to recover from.

His official status since then has been day to day as he slowly began rehabbing. Now he hopes to be ready to face a team he played for from 2019-22.

Porzingis took to social media this week to provide his most significant update, posting on the X platform, “I’ll be back in the lineup very soon. See you in the finals.”

Two days later, when the doors were opened to the media Friday after a practice session, Porzingis was one of only a handful of players still on the court, going through extended 3-point shooting drills with assistant coaches and trainers. He wore a compression sleeve on his injured left leg.

Then on Saturday, he participated in light 5-on-5 play with his teammates – his most extensive on-court workout since sustaining his injury.

Mazzulla said Porzingis “did everything the team did” during Saturday’s practice and was expected to go through a more intense session on Sunday.

Assuming he clears that benchmark, it would mark the most promising sign yet that the Celtics could soon get back the scorer and rim protector that Boston acquired this past offseason in exchange for longtime stalwart Marcus Smart.

When healthy, Porzingis has been good on both ends of the floor. He averaged 20.1 points, 7.2 rebounds and 1.9 blocks during the regular season while appearing in 57 games. Before his injury in the Miami series, he averaged 14.0 points, 5.7 rebounds and 1.5 blocks.

Porzingis missed seven games earlier this season because of what the team called a left calf injury. He also missed time with a smattering of other issues this season – inflammation and bruises in his right knee, right hamstring problems, a sprained left ankle, and a sore back.

Those ailments added up to 25 missed games in which Boston went 21-4.

Still, the Celtics say they’re a better team when Porzingis is on the court.

Celtics guard Derrick White, who was voted to the NBA All-Defensive third team along with teammate Jrue Holiday, said Porzingis’ presence on the defensive end is hard to replicate.

“He does a great job of just making things difficult,” White said. “It’s always nice to know that he’s back there, whether he blocks or he doesn’t block. He makes them think about it. That’s been really great having him on our side, just doing the things he did, day in and day out. Once he comes back and gets in the flow, I think it’s going to be nice.”

Holiday said one of the reasons the Celtics have been able to excel without Porzingis during this stretch is because they remember what it was like going through those periods during the regular season without him.

“I go back to the regular season, where sometimes KP was out and Al (Horford) was in, and vice versa. We literally went through it before,” Holiday said. “We kind of went through all scenarios before of what could happen or what would happen or whatever. And it kind of shows.”

That said, Holiday said the preference is to have Porzingis available when the finals tip off on Thursday. He doesn’t think reintegrating him back into the lineup will be an issue.

“KP is one of the best scorers. He’s one of our best rim protectors,” Holiday said. “And I feel like we’re all mature enough to get back in the groove or have him fit right back in whenever he comes back. And we do want KP back. We can’t wait for him to be back and be a part of this on the court.”