Leipzig got the better of United 3-2 at home in Champions League Group H.
Angelino put the German club in the lead at the Red Bull Arena after just two minutes, and Haidara doubled the advantage on 13 minutes.
Justin Kluivert found the back of United net in the 69th minute, and it appeared that the Bundesliga club were heading for a comfortable 3-0 win.
However, United pulled one back in the 80th minute from a Bruno Fernandes penalty and found the back of the net again just two minutes later through an own goal from Ibrahima Konate.
The 3-2 win means that Leipzig have progressed to the last-16 stage of the Champions League with 12 points from six matches.
Haidara has taken to Twitter to express his delight at scoring for Leipzig against United.
Proud to have scored my first Champions League goal
— Amadou Haidara (@doudouhaidara04) December 9, 2020
See you soon UCL #RBLMUN pic.twitter.com/tmaYi19FqW
Match Stats
Over the course of the 90 minutes at the Red Bull Arena on Tuesday evening, hosts Leipzig had 45% of the possession, took nine shots of which four were on target, and earned four corners.
Visitors United had 55% of the possession, took 19 shots of which seven were on target, and earned 10 corners.