What's missing? Ray Allen's touch

(The Miami Heat host the Boston Celtics in Game 2 of the Eastern Conference Finals, Wednesday at 8:30 ET on ESPN.)

The Boston Celtics have lost five consecutive postseason road games against the Miami Heat, dating to 2010. According to the Elias Sports Bureau, that is the third longest postseason road losing streak in franchise history against one opponent. The Celtics lost seven straight playoff road games against the Philadelphia 76ers from 1977-81, and six in a row against the New York Knicks from 1969-73.

Also according to Elias, Miami’s home win streak against Boston is its longest postseason home streak against one opponent.

If the Celtics are going to end their skid in Miami, then they will have to get production from Ray Allen, who is averaging less than 10 points per game this postseason. In his previous eight postseasons, Allen didn’t average less than 15.6 points per game.

Allen, who will not take a game off to rest his injured right ankle, is shooting a career postseason-worst 26.8 percent from 3-point range (15-56), and also has shooting career postseason lows in overall field goal percentage (39.0) and free throw shooting (60.0, 18-30).

Ray Allen Spot-up Shots This Season

As a spot up shooter, Allen has seen his production decline this postseason. He’s made just 29.4 percent (5-17) of his spot-up shots in the playoffs after making 49.5 percent during the regular season.

In his career, Allen has been one of the best shooters coming off screens. However, he has struggled on those shots as well.

Allen is shooting just 34 percent coming off screens this postseason, his lowest percentage on such shots since joining the Celtics in 2007-08. Allen shot 45 percent coming off screens during the regular season.

Allen will look to find his rhythm in Game 2, and boost a Celtics starting five which was outscored by the Heat’s 77-56 in Game 1.