All-Star Pointkeeper Kyrie Irving left the Celtics' game on Saturday against LA Clippers in Boston with a right knee sprain and did not return.
The Celtics were in control of the game when Irving injured his knee In the second quarter, it was about five minutes before trying to defend Garrett Temple at the head of the key.
The Clippers outperformed Celtics 75-44 after Irving left the game, winning from 28 points to 123-112.
Danny Ainge, president of Celtics, said the "commitment" of the starguard team Kyrie Irving remains intact and he believes that they will swap vows and "marry" on July 1 for decades to come. Against the background of an exciting finale on Thursday night, the next fight will be this summer as both teams try to land the coveted Pelicans star.
It was the NBA's biggest comeback in the last two seasons and the biggest in Clippers history. It was the largest lead by a Celtics team since December 5, 2003.
Two nights earlier, Boston gave up an 18-point lead over the Los Angeles Lakers at TD Garden.
Brad Stevens, Celtics coach, said Irving Knie seemed to "buck" and the 26-year-old will undergo further tests on Sunday.
But Stevens said the injury was not to blame for the collapse of his team.
"There are no excuses," Stevens told NBC Sports Boston. "These things happen and we all have to catch up, I go back and find out what I can do better, what we can do better, and we will continue from there."
Celtics storms Marcus Morris attributed the loss to the team's lack of cohesion and described his efforts as "unacceptable."
"When I look at myself, I only see a number of individuals," Morris said. "We're going to lose games, but if we do not have a mindset, if we do not have tenacity, if we're not having fun, it's going to be a long season."