(Associated Press)

We all know that a No. 16 seed has never beaten a No. 1 seed in the NCAA tournament’s first round. But what about the other seed pairings? Let’s go through them using The Post’s NCAA tournament database. All results go back to 1985, when the tournament expanded to 64 teams.

No. 1 vs. No. 16

No. 1 seeds lead, 120-0

Of note: The closest game was Georgetown’s one-point win over Princeton and Oklahoma’s one-point win over East Tennessee State, both in 1989. Next closest: Purdue 73, Western Carolina 71 in 1996.

[Most vulnerable top seeds in 2015]

No. 2 vs. No. 15

No. 2 seeds lead, 113-7

Of note: Three of those No. 15 wins came in either 2012 (Norfolk State over Missouri, Lehigh over Duke) or 2013 (Florida Gulf Coast over Georgetown).

[Three teams that could beat Kentucky]

No. 3 vs. No. 14

No. 3 seeds lead, 102-18

Of note: Two No. 14 seeds won in the same tournament only twice, in 1986 (Arkansas-Little Rock over Notre Dame, Cleveland State over Indiana) and 1995 (Weber State over Michigan State, Old Dominion over Villanova).

[Most likely first-round upsets]

No. 4 vs. No. 13

No. 4 seeds lead, 95-25

Of note: A 13-4 upset happened every NCAA tournament from 2008 to 2013.

[Four lower seeds that could go deep]

No. 5 vs. No. 12

No. 5 seeds lead, 76-44

Of note: Read all about 12-5 upsets right here. Hint: They’ve happened a lot lately.

[Why the South Region is ripe for upsets]

No. 6 vs. No. 11

No. 6 seeds lead, 79-41

Of note: Since 2007, No. 6 seeds are just 18-14 against No. 11 seeds in the first round.

[How to win your pool without picking Kentucky]

No. 7 vs. No. 10

No. 7 seeds lead, 73-47

Of note: In 2010, three No. 10 seeds won their first-round matchups. Since then, No. 7 seeds have gone 11-5 against No. 10s.

[President Obama makes his tournament picks]

No. 8 vs. No. 9

No. 9 seeds lead, 61-59

Of note: Since 2011, No. 8 seeds are 11-5 vs. No. 9 seeds in the first round.

[It’s Kentucky vs. the field, and the field is the underdog]