Kyrie Irving

Dallas Mavericks star Kyrie Irving has a torn ACL in his left knee and will miss the rest of the season, a person with knowledge of the injury told The Associated Press on Tuesday.

It was the first Game 2 loss of these playoffs for Dallas, which had won three straight — all on the road. The Mavs now face the daunting task of having to beat a Boston team that has lost just twice this postseason in four out of five games.

The match-up between the Dallas Mavericks and Boston Celtics is absolutely loaded with compelling storylines. Here’s a look at what to watch out for going into Game 1.