The NBA has never had a team comeback from a 3-0 deficit to win a playoff series, which makes the odds of a matchup in The Finals between the Boston Celtics and Los Angeles Lakers an extreme longshot with both teams down 3-0.

According to BetMGM, the odds of the Celtics and Lakers meeting in this year's Finals is +15000. The implied probability of the scenario is 0.66 percent.

For the individual series, the Lakers are at +1400 (6.67 percent) to comeback from a 3-0 deficit to beat the Denver Nuggets.

The Celtics are being given better odds against the Miami Heat as underdogs at +800 (11.1 percent).