Rivers moved to the Clippers in the summer following a nine-year stint in charge of the Celtics, which included a championship win in 2008.
The head coach told reporters: "I was basically useless for the first 18 minutes of the game, I thought. It was nice. It didn't surprise me. You've got to live here to understand that. [It is] an amazing fan base, it really is. And I just want everything to go well for them.
"Coming back here, that's special to me. I get to walk under a banner that I helped get and see the fans and a lot of my friends. This day and half has been a lot of fun, but it's also been emotional, too."
The Clippers face the Brooklyn Nets later today.