Messi returns to PSG line up after missing out on his team weekend win over Angers.
PSG know a win tonight would take them to the top in Group A followed closely by Manchester city who won there game earlier in the day.
Kylian Mabappe score first in the encounter before Leipzig scored in the 28th and 57th minutes to turn the game on its head.
Then came the Messi moment, 67th minute it was when he picked up a pin-point pass in box and tried a snap shot which was saved but rolled back to messi for a rebound which he converted calmly.
Messi got his second goal of the night and PSG winning goal from the Penalty spot.