Celtics coach Brad Stevens said earlier on Wednesday that he wasn't sure when Hayward's surgery would be or what the timetable would be for his recovery.
Prior to tipoff Wednesday, the Celtics aired a message from Hayward so he could address the fans in attendance for the home opener.
"I'm not going to speculate or put a timeline on it", he told reporters Thursday. "But that's not what we're looking at right now".
If Hayward is out for the season, the Celtics can collect on insurance by getting back $275,000 per game for the 41 games missed. It hurts me that I can't be there for the home opener. I want nothing more than just to be with my teammates and walk out onto that floor tonight.
"But I'll be supporting you guys from here and best of luck". Hayward joined an unfortunate collection of athletes including Shaun Livingston, Paul Goerge, and Kevin Ware, among others, where the injury is so disturbing, so upsetting, they put you at a loss for words. "I thought the Cavs organization was top notch in taking care of him of while we were there. We haven't really gotten into it too much because we have our hands full tonight".
Hayward, who was a free agent, signed a four-year, $128 million contract with the Celtics on July 1.