Philadelphia's 106-93 Game 6 win pushed Celtics-Sixers to Game 7 in Boston, and Jayson Tatum's left calf is the first thing everyone will stare at.

Fine. Stare at it. But do not turn the whole game into an injury referendum before the ball even moves. The calf matters if it changes Boston's basketball: Tatum's first step, his ability to turn the corner, his defensive workload, and whether the Celtics can still get clean shots before the clock gets ugly.

Tatum briefly left Game 6 for treatment on an apparent left calf issue. He said the leg felt a little stiff and that he did not return because the game was out of hand. Joe Mazzulla said there was no injury. That gap is exactly why the opening minutes matter more than the pregame argument.

The first two drives will tell you more than the first two jumpers. A sore-looking make can trick you. A miss after Tatum gets downhill is not the same as three trips where he cannot create the first advantage. If he can catch, attack, draw help, and force Philadelphia to rotate, Boston still has the better home Game 7 position. If every catch turns into a jab-step reset and a late-clock pull-up, the calf has become a possession problem.

Boston's other tell is the half court. The warning sign is not one bad miss. It is the ball arriving late, Tatum catching without leverage, and the Celtics settling before Philadelphia has had to send real help. A Boston loss would be its earliest playoff exit since 2020-21, so looking mostly normal for a few stretches is not enough. The Celtics have to produce clean offense when the game tightens.

Maxey is the Sixers' pressure point. His 30 points in Game 6 mattered because they came attached to pace, pressure, and Philadelphia forcing Boston into the next game. If he gets clean downhill touches early, the story is no longer just Tatum's movement. It becomes whether Boston can stop a live ball, organize its offense, and keep the floor from tilting toward Philadelphia.

The read changes quickly. Normal first-quarter burst, no obvious defensive hiding, and organized fourth-quarter offense shrink the calf story. Repeated early settles, easier defensive assignments, or Maxey turning misses into runways make it real. So watch the leg, yes. Then watch the possessions it changes.