ESPN Forecast: Series odds for Celtics-Cavaliers, Warriors-Spurs

Relive the Celtics-Cavaliers regular-season drama (1:41)

LeBron James and the Cavaliers are 3-1 against Isaiah Thomas and the Celtics in the regular season. Who will come out on top in the Eastern Conference finals? (1:41)

Who's headed to the NBA Finals? Will we see the next installment of the Warriors-Cavaliers trilogy, or will the San Antonio Spurs and/or Boston Celtics pull the upset?

We polled the ESPN Forecast panel of experts heading into Game 1 of the Celtics-Cavaliers and Warriors-Spurs conference finals matchups.

Here are the results, with each team's updated chances to win and predictions from ESPN's Basketball Power Index (BPI), FiveThirtyEight and a fan poll.

More: BPI | FiveThirtyEight projections | 2017 Playoffs

ESPN Forecast: Celtics-Cavaliers

Forecast odds: Cavaliers (70 percent to win series)
Game 1: Wednesday -- CLE at BOS (8:30 p.m. ET, TNT)

ESPN Forecast: Warriors-Spurs

Forecast odds: Warriors (80 percent to win series)
Series: Warriors 1, Spurs 0

ESPN Forecast and the fan panel predictions were conducted in coordination with Microsoft Research. Join the fan panel here.