While not technically a must-win game, Game 4 is the Bulls' most important game of the season as they look to even the best-of-seven series at home.
And so it's the crucible for the Bulls noon Sunday in Game 4 of their Eastern Conference first round playoff series with the Milwaukee Bucks. It's perhaps their seminal moment to discover if an alchemy of resilience, tenacity and strength can be turned into the gold of victory.
Because if the Bulls lose a second straight game at home to the defending NBA champions to fall behind 3-1 after Friday's debilitating defeat, this week probably becomes a wait until next season moment.