The Boston Celtics and Memphis Grizzlies went into Tuesday aware that they would know their opening-round postseason opponent by the end of the day.

Such is the life of an NBA No. 2 playoff seed.

For the Miami Heat, No. 1 in the Eastern Conference ahead of Boston, and the Phoenix Suns, No. 1 in the West ahead of Memphis, the wait will continue until Friday night.

Such is the case when the entire play-in round has to completed in order to produce the No. 8 seeds from the pool of four play-in teams in each conference.

To Heat coach Erik Spoelstra, it is part of the tradeoff for homecourt advantage throughout the conference playoffs.

“That’s the whole point of a regular season,” Spoelstra said, “you don’t need to live in fear or panic.”

With the Heat to open the best-of-seven first round on Sunday at FTX Arena, it means only Saturday’s practice will come with knowledge of their initial postseason opponent.

No matter, Spoelstra said,

“We’ll ramp it up middle of the week,” he said, “and we’ll just make sure we’re working on our habits, our rhythm.

“And then when we finally get the nod of who we’re playing, we’ll dial into the details of our specific opponent.”

Guard Duncan Robinson said there is plenty to be said about instead turning inward, including during Wednesday’s practice at FTX Arena.

“The emphasis will be on us, just getting better,” he said. “At the end of the day, on Sunday you just got to be ready to win one game, and we feel like with these five days we can find a way to do that.

“And from there, the adjustments will ensue, and we’ll figure out how to get game two from there.”

This is the first time the Heat have held homecourt advantage in any round since the 2016 first round that they took 4-3 from the Charlotte Hornets.

Among concerns for the Heat this week is the calf strain that had starting power forward P.J. Tucker out the final two games of the regular season, the ankle sprain that had backup center Dewayne Dedmon out for three of the season’s final four games, and the entrance Sunday by starting center Bam Adebayo into NBA health-and-safety protocols.

By rule, the Heat do not have to post an injury report until 5:30 p.m. Saturday.

Trophy time

Although unaware at the time, the Heat won the Earl Lloyd Trophy for winning the Southeast Division.

While the NBA has devalued divisions to the degree that even winning one does not guarantee a playoff berth, the league announced this week that each division now will have its own trophy.

Each trophy honors an African-American pioneer, the NBA said to “celebrate the teams’ season success and honor the pioneers who helped pave the way for the NBA players that have followed.”

Lloyd was the first African-American to play a game in the NBA, a career that included nine seasons split between the Washington Capitols, Syracuse Nationals and Detroit Pistons, winning an NBA title in 1955.

Other divisional trophies honor Nat Clifton (Atlantic), Wayne Embry (Central), Willis Reed (Southwest), Sam Jones (Northwest) and Chuck Cooper (Pacific).

The Heat do not hang individual banner for division titles, with such finishes grouped together in a series of banners. The team hangs separate banners for conference and NBA championships.

The Heat have won 15 divisional titles in their 34 seasons.

Toeing the line

The Heat closed at .808 from the foul line, the highest single-season percentage in team history. That included Jimmy Butler shooting a team-best and career-high .870, the third-highest single-season percentage in franchise’s 34 seasons, behind only Ray Allen’s .886 in 2012-13 and Glen Rice’s .880 in 1993-94 . . .

The Heat not only took a league-high 111 charges this season, but blew away the 64 of the runner-up Houston Rockets. The previous high since the NBA began tracking charges in 2010-11 was the 107 of the Phoenix Suns in in 201-11 . . .

The Heat finished the regular season 29-2 when shooting at least 40 percent on 3-pointers and 22-1 when shooting at least 50 percent from the field.

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