#1 Sadio Mane against Dalot/Valencia
Diogo Dalot made his second Premier League start against Fulham last weekend, and he was solid in defense and even joined forces in attack. Mourinho compared Dalot with United legend Gary Neville, and assured the fans of a long-term replacement for Antonio Valencia at the right-back position.
However, it would be interesting to see whether Mourinho starts with Dalot against a strong Liverpool side. He has the experience of Valencia at his disposal, and might play him instead in this high voltage fixture.
Whoever plays in the right full-back position would have his task out cut against Sadio Mane. The Senegalese international is one part of the destructive trio that Klopp has in his armor.
Mane's pace and power can give any defender a hard time. When the chips are down, he can also come up with the crucial match-winning goals.
If United can stop Mane, it would go a long way in deciding the fixture.