Roach said on Fox League commentary: "That is just unbelievable scenes."
Co-commentator Warren Smith called it "absolutely incredible".
Melbourne Storm great Cooper Cronk told Fox League: "I don't think I've seen an individual effort from a player (like that) for a long, long time.
"I'm in awe for the first time in a while. Roger Tuivasa-Sheck, I tip my hat to you son.
"That was an outstanding second half and a desperate last play to save the game for your team."
It was statistically the biggest comeback for the Warriors in NRL history, with the New Zealand side coming back from a 31-10 deficit at the 50-minute mark.
Tuivasa-Sheck registered 137 running metres, six tackle busts, two linebreaks and a try in the second half.
"Last week we spoke about we lost a game in moments, and this week we won a game in a few moments," Tuivasa-Sheck said after the win.
"That's going to play a big part, just wanting it more than the opposition."