In a stunning development that has sent shockwaves through the NBA playoffs, Boston Celtics star Jayson Tatum has been ruled out of Sunday's pivotal Game 7 against the Philadelphia 76ers due to left knee stiffness. The All-Star forward was a late addition to the Celtics' injury report on Saturday, and after further evaluation, the team made the difficult decision to hold him out of the winner-take-all showdown.

Tatum's absence is a massive blow to Boston's championship aspirations. The 24-year-old has been the engine of the Celtics' offense throughout the postseason, averaging 27.2 points, 8.1 rebounds, and 4.3 assists per game. His ability to create his own shot and stretch the floor has been crucial against Philadelphia's formidable defense, anchored by MVP candidate Joel Embiid.

Without Tatum, the Celtics will need to rely on their depth and defensive tenacity. Jaylen Brown will likely shoulder the primary scoring load, while Marcus Smart's playmaking and Al Horford's veteran presence become even more critical. The team will also look to role players like Derrick White and Malcolm Brogdon to step up in extended minutes.

For the 76ers, this represents a golden opportunity. After dropping Game 6 in Boston, they now face a Celtics team missing its best player in a do-or-die scenario. Philadelphia's defense, which has been inconsistent at times, can now focus more attention on Brown and limit Boston's offensive options.

Game 7 tips off Sunday at 3:30 PM ET at TD Garden, where the Celtics will attempt to advance despite the absence of their star. The stakes couldn't be higher—the winner earns a trip to the Eastern Conference Finals to face the Miami Heat.