Liverpool beat PSV, Chelsea beat Valencia meaning and all english semi final and a repeat of 2 years ago, meanwhile United beat Roma and then beat Bayern or Milan meaning an all English final
scenario 2
Psv beat Liverpool, and then beat Chelsea or Valenica in the semis meaning they will play in the final that they should really have played in 2 seasons ago, Roma beat United and then play Milan in an all Italian semi final and beat them meaning the two underdogs play each other in the final.