There isn't a contemporary NFL quarterback rivalry quite like Josh Allen versus Patrick Mahomes. While the MVP-level signal-callers don't play in the same division, they've made a habit of meeting in high-stakes contests.

This will be the fourth meeting between Patrick Mahomes and Josh Allen in the playoffs, with Mahomes having won the three previous matchups. On Thursday, the Chiefs star addressed the media and told Kansas City fans who would be in attendance to "take it up a notch" to "see how loud" Arrowhead Stadium can get.

We break down the biggest strengths and question marks in the Bills-Chiefs matchup, plus the X-factors that could make all the difference.