The South Korean full-back had been itching to get back in action after a knee injury which has kept him out since early April.
And although he admits he still has a little way to go before he is 100 per cent fit again, Lee still managed to come through 90 minutes without any ill effects.
He said: “After not playing a match in four months, and then coming back to a winning team, I’m definitely happy, as is everybody. Also, my injury feels better, so I’m delighted.
“The nature of the game helped because we got two goals in the first five minutes! After that, we took control, played the ball well, and had many chances. It’s fantastic for us.
“I still need to work on my condition, but once I’m 100 per cent, I think I’ll be even better than before.”
Young-Pyo Lee says his long-awaited return from injury on Saturday was made even better by a 4-0 win over Derby.