Thursday has one game. It follows one of the most remarkable individual performances this postseason has produced, and it isn't Wembanyama's 41-point double-double.

Jalen Brunson scored 38 points in Game 1 of the Eastern Conference Finals, erased a 22-point fourth-quarter deficit, and led the Knicks on a 44-11 run over the final 7:40 of regulation and overtime that turned a building that had gone quiet into the loudest arena in basketball. He made eight of his final ten shots while specifically targeting James Harden on screen after screen in a closing stretch that will be replayed in New York for years. Cleveland had this game. Then Brunson happened. The Cavaliers had 21 turnovers, their two stars combined to miss nine of their last ten shots, and Donovan Mitchell said afterward: "That can't happen. But it did."

Game 2 is Thursday in the same building. Mitchell says Cleveland won't let it kill their momentum. The Garden expects him to be wrong again.

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Cleveland Cavaliers (4) at New York Knicks (3) | 8:00pm ET, ESPN

The tactical issue at the center of Game 1's collapse is the one Kenny Atkinson has had two days to address, and the one Cleveland absolutely cannot repeat. The Knicks ran 21 on-ball screens targeting Harden in the fourth quarter and overtime, generating isolations that produced 1.9 points per play for New York. Cleveland did not send consistent help. Harden was left exposed, Brunson made eight of ten shots attacking him, and the Cavaliers' defense turned a 22-point lead into a deficit in under eight minutes. Atkinson's postgame "unlucky" characterization of the loss did not go over well publicly, but whatever language is used to describe it, the scheme was the problem and the scheme has to change.

The adjustment Cleveland makes to Brunson's crunch-time hunting shapes the entire tactical landscape of Game 2. If the Cavaliers blitz Harden more aggressively to prevent clean Brunson isolations, the ball moves to Towns, Bridges, and Anunoby, all capable shooters who can make them pay for the help. If they try to hide Harden entirely by keeping him away from Brunson's screen actions, they reduce his offensive contribution in a game where 15 points on 5-for-16 shooting was already a liability. There is no clean answer, which is exactly why Brunson has been the most important player in this building all postseason.

Mitchell's response is the other critical variable. He had 29 points and six steals in Game 1, a genuinely strong individual performance, but he combined with Harden to miss nine of their last ten shots while the Knicks' defense dismantled everything Cleveland had built over three and a half quarters. Mitchell has been insistent that the loss won't define the series, and he is right that two days is not enough time for a 22-point collapse to become a psychological anchor. He is a player who has had defining individual moments in this postseason, most notably his 39-point second half in the Detroit series. Thursday is when he has to produce another one, in the same building that watched him go cold, in front of a crowd that now believes fully in what this team can do to him.

Cleveland had 21 turnovers in Game 1, and Harden was responsible for six of them. That number is not sustainable for any team trying to win a conference finals series, and it reflects the combination of Brunson's defensive pressure and the Cavaliers' carelessness in late-game situations when the game plan broke down. Mitchell, Mobley, and Allen gave Cleveland enough to win the game they were playing through three quarters. Harden's performance is what lost it.

Towns is the matchup problem Cleveland still hasn't solved. His 13-point, 13-rebound, five-assist line in Game 1 came on a night where he struggled from the field. If he shoots better on Thursday, the Cavaliers' interior defenders face a player who can hurt them from anywhere on the floor. KAT specifically credited New York's defense as the difference in the closing stretch, and that defense has been the most consistent element of the entire Knicks playoff run. It is anchored by Anunoby, who played limited minutes in his return from the hamstring but is expected to be more available and more comfortable in Game 2.

Going down 0-2 in this series means heading to Cleveland with the series in grave danger. The Cavaliers have proven throughout this postseason that they can come back from deficits, from 2-0 against Detroit, from halftime holes, from moments where the season felt like it was slipping. But coming back from 0-2 in a conference finals against the East's hottest team requires winning at least one game at Madison Square Garden, and the Knicks have not lost at MSG in eleven consecutive playoff games.

Cleveland wins if Atkinson makes the defensive adjustments that neutralize Brunson's late-game hunting, Mitchell plays the kind of clutch and aggressive fourth quarter that has defined his best playoff moments, and the Cavaliers cut their turnovers to a number that doesn't gift the Knicks momentum on a platter. Winning on the road to even this series before it heads to Cleveland would be the most important result of the Cavaliers' postseason.

New York wins if Brunson is himself again, which given the last three weeks of this postseason is the most reliable assumption in the East, and the MSG crowd creates the environment that has made this building nearly unbeatable all playoffs. Going up 2-0 before the series shifts to Cleveland puts the Knicks within two wins of the NBA Finals. They haven't been there since 1999. The crowd knows exactly what that means.

There is one game. It is the most important game of the Eastern Conference Finals so far, not because the stakes are existential yet but because the psychological weight of what happened in Game 1 is still fresh enough to determine what Cleveland's team actually looks like when the building is hostile and the crowd is at full volume.

Brunson's 44-11 closing run was the kind of performance that either breaks an opponent's belief or sharpens it. Mitchell said Cleveland won't let it define the series. He has two more days and 48 more minutes to prove he's right. The Garden will be loud enough to make every one of those minutes feel longer than they are.

Game 2 tips off at 8pm. The series is one game in. It already feels like much more.