After the play, Williams punched Moreno and drew a personal-foul flag.
That was one of 10 penalties the Volunteers were flagged for in a game dubbed by many fans as dirty.
That, however, wasn't exactly how Southerland saw things.
"I thought it was a pretty clean, fair game except for that one play," he said.
Tennessee desperately needed the win to avoid a catastrophic 0-3 start in the SEC, but Georgia dominated throughout, controlling the tempo and time of possession.
The frustrations flared up as the game wore on, Georgia linebacker Akeem Dent said, but even he didn't think Tennessee's play was dirty.
"It's the game of football," Dent said. "Everybody goes out there with some fight and passion before you go out there. You go out with a lot of aggression. I don't feel like they were playing unfair, but it was just an aggressive game."
Southerland said Moreno complained about the punch after it happened, and the two watched it on film again Monday, but there was never a thought of getting retribution on the field.
"Knowshon's a smart player," Southerland said. "He's not going to take a cheap shot, and Knowshon got the best of him."