LeBron James Marcus Smart
LeBron James, pictured defending Marcus Smart at Quicken Loans Arena on May 21, 2017 in Cleveland, leads the Cleveland Cavaliers as heavy favorites over the Boston Celtics in Game 4. Getty Images

With one half of the 2017 NBA Finals having already been decided, the Cleveland Cavaliers and Boston Celtics will compete to complete the matchup. A day after the Golden State Warriors swept the San Antonio Spurs in the Western Conference Finals, Game 4 of the Eastern Conference Finals will get underway.

Game 4 is scheduled to start at 8:30 p.m. EDT. TNT will have the TV coverage, and fans have the opportunity to watch a free live stream online with tntdrama.com.

READ: LeBron James, Cleveland Cavaliers Should Bounce Back In Game 4

It looked like the Warriors and Cavaliers might win their respective conferences with 12 straight wins, but only Golden State could make history. They remain undefeated in the playoffs, while Cleveland suffered their first loss of the postseason in Game 3.

It was no ordinary defeat, however, as the Cavs blew a 21-point lead after they entered the game as 16-point favorites at home. That marked the biggest upset in the NBA playoffs in the last 15 years. Since 1995, only two teams have been underdogs of more than 16 points and gone on to win that game, according to RJ Bell of pregame.com.

“We were playing way better. I don't know how to phrase it other than that. We were playing way better,” Celtics head coach Brad Stevens said after Sunday night’s comeback. “We were getting good shots on offense and playing with great purpose, and on defense I thought we were much better than the score indicated. I think that when you play better, you feel better. And you just kind of stay the course.”

In addition to getting key contributions from the bench and making 45 percent of their three-pointers, Boston limited LeBron James to his worst playoff performance in six years. The four-time MVP hasn’t been that bad since Game 4 of the 2011 NBA Finals against the Dallas Mavericks in which he scored just eight points.

James put up just 11 points against the Celtics in Game 3, and he didn’t score in the fourth quarter.

“He's human, so he's going to have a night like this,” Cavs coach Tyronn Lue said. “He didn't shoot the ball well, and we still had a 20-point lead. A game we should have won, but they played hard. They scrapped. They have a scrappy team. We knew that coming into tonight. We knew it wouldn't be easy, but we got some things we can correct and come back ready [for Game 4].”

Prior to Game 3, James hadn’t scored less than 25 points in a playoff game this year, shooting at least 50 percent from the field in each contest. He’s now scored less than 15 points in six career postseason games.

Boston will have a chance to even up the series at 2-2 if James plays poorly again. Game 5, which once seemed like it wouldn’t be necessary, is now certain to happen at TD Garden Thursday night.