Lots of talk today about zonal marking on set pieces because of Klopp's appearance on MNF ... but I really wish someone had contrasted that with the man marking system Leicester used and how United exploited it routinely.
Liecester has a pair of very strong defenders in the air, but the rest of the squad they put out was a bit undersized. Mourinho abused this by having Zlatan (man marked by Morgan) pull his man wide and past the near post on nearly every corner (a few times out past the far post as well). Because United has a number of big aerial threats, this meant that Huth was left as the only effective defender in the air in the mouth of goal and 3 or 4 mismatches for United in his vicinity.
Take Pogba's goal for example ... Morgan is way out of the picture (literally past the goal behind the far post) because Zlatan has dragged him so wide. Huth is marking Smalling who is also running towards the back post ... so there is no strong aerial defender anywhere near the front post. Pogba is man marked by Fuchs, who simply has 0 chance of stopping him. As far as set piece goals that was extremely simple, and it mostly comes down to the fact that United just tore up Liecester's man marking system.