48. UCLA vs. Gonzaga
It feels odd, almost wrong, to claim that a series which began in 1999 and has featured only 10 total games could be a top 50 rivalry in the sport, but here we are. Out of the 10 games that these two West Coast powerhouses have played, three of them have been among the most memorable NCAA Tournament games of the past two decades. Gonzaga owns a 7-3 advantage in the series, which will continue this season when the two teams square off on Dec. 13 in Seattle.