With just three games left in the regular season, the Boston Celtics are on the cusp of locking up the No. 2 seed in the Eastern Conference. A single win or a New York Knicks loss will seal the deal, potentially as soon as Thursday's high-stakes matchup at Madison Square Garden. But while their own position is nearly set, the identity of their first-round playoff opponent remains a fascinating mystery.

The Eastern Conference standings are incredibly tight, with only 1.5 games separating the sixth-place Toronto Raptors from the ninth-place Charlotte Hornets. This logjam means the Celtics' first foe will emerge from the play-in tournament, specifically the winner of the game between the East's seventh and eighth seeds. For Boston, scouting reports need to cover multiple teams.

Let's break down the four most likely candidates who could be coming to the TD Garden for a first-round series, each presenting a unique challenge for the green and white.

First up, the Charlotte Hornets (1-2 vs. BOS). Don't let their play-in positioning fool you—the Hornets have been one of the league's hottest teams in the second half. Their high-octane offense and elite shooting make them a potentially pesky matchup, as evidenced in Tuesday's game. They boast a top-10 net rating, a claim none of the other potential opponents can make, marking them as a serious threat.

Then there's the Philadelphia 76ers (2-2 vs. BOS), a team defined by "what ifs" centered on health. If Joel Embiid and Paul George are fully operational for a playoff series, their talent alone makes Philly dangerous. However, their season-long inconsistency and injury woes leave a big question mark over their potential to sustain a challenge.

The Miami Heat and Toronto Raptors round out the likely pool. The Heat, perennially a tough out in the postseason, bring their trademark physicality and defensive grit, though they've struggled with offensive consistency this year. The Raptors, meanwhile, are a wild card with explosive athleticism but have shown vulnerabilities the Celtics have exploited.

For the Celtics, the final days of the regular season are about fine-tuning their game and preparing for any scenario. The uncertainty adds an extra layer of intrigue to the playoff build-up, as Boston awaits the outcome of the play-in scramble to see which rival will first test their championship mettle.