Ndulula thought he had written his name in Orlando Pirates' history when he headed the ball past Itumeleng Khune a few minutes before the end of the game, but Victor Hlungwane adjuged him to have pushed Amakhosi defender Dominic Isaacs in the process.
"We went 50/50 on the ball and fortunately I won the header to score the goal," Ndulula says. "I was surprised when the referee ruled it offside, claiming that I pushed the Kaizer Chiefs defender, because I did not do anything and just won aerial ball fairly.
"I was so sad because that would have been my first goal in a cup final, and also would have meant we avoided extra-time.
"But despite that I am happy that in the end we managed to win and keep the MTN8 trophy. Hopefully we can win still more trophies this season."
Pirates are set to host Santos in their next Premiership match on Wednesday, before meeting Kaizer Chiefs again on Saturday.
Oupa Manyisa, who got the winner against Bucs yesterday, says that victory is now history.
"The win against Chiefs in the MTN8 Final is now done and dusted," he says. "Tomorrow we start another new day and we are focusing on doing well against Santos on Wednesday."