After scoring the decisive goal in the 1-0 victory, the France international said his celebrations were bittersweet.
"It's an extraordinary feeling, a lot of happiness. I'm 100 per cent Bayern, but it makes me a bit sick for PSG," Coman told RMC Sports.
"We've been trying to keep the game under control from the start. We won and we didn't take a goal today, that's the most important thing.
"Paris played a great game, we played a great game and we're really happy."