While Boston rallied from an 0-2 hole against the Bulls, Bradley noted how the Celtics went to Chicago expecting to win two games and even the series.
"We definitely want to finish it tonight", said Isaiah Thomas.
This will be the Wizards first Game 7 since 1979.
Wall's heroics came after Al Horford's jumper with 7.7 seconds left put the top-seeded Celtics ahead 91-89. Wearing black, it's great - great color. We've worked too hard for this.
Asked about his players' sartorial selections - and his own choice of a white shirt - Boston's Brad Stevens said: "I'm not on the text chain". In fact, Horford apparently prevented a fight from breaking out in the Celtics locker room during halftime of game five, as Avery Bradley explained in his post-game press conference on Wednesday night.
The C's destroyed the Wizards in game five with a 123-101 clubbing, as Avery Bradley, 26, and Al Hoford, 30, led the effort with a combined for 48 points on just 28 shots.
Just being within striking distance was a victory of sorts for the Celtics, who spent most of the first half trailing. He and Avery Bradley each had 27 points.
To find out, watch the Boston Celtics vs. Washington Wizards Eastern Conference second-round playoff Game 6 live stream online from the 18,200-seat Verizon Center in the nation's capital city, Washington, D.C., with streaming video provided by WatchESPN at this link, or by downloading the WatchESPN app to watch a live stream on mobile devices.
It marked the fourth time in the series that one team has had a run of at least 16-0, including three times in the first quarter. On the morning of Game 6, Wall told reporters how he needed to "control" this moment.
The Wizards went a stretch late in the second quarter to early in the third where they missed all 14 shots they attempted. If the Celtics win, they would move on to host the Cleveland Cavaliers to open the Eastern Conference finals.
John Wall steps up in the clutch when the Wizards needed him the most. It gave the Wizards a 92-91 lead that would hold for the final 3.5 seconds.
The Celtics spent most of the second half playing with a lead, a position gained near the end of the second quarter.
Wall continued his trend of slow starts. After Marcus Smart took a charge on John Wall, Thomas was trapped and turned the ball over, leading to a transition three from Beal with 1:09 left.
Following a pair of free throws by Jae Crowder, the game was knotted up at 82.
Horford hit his incredible shot before Wall outdid him for the win.style="text-align: center;"