Author: Jeff Zillgitt and Matt Eppers, USA TODAY

The NBA Finals shift to Boston with the series tied at 1-1. Here is broadcast information, X-factors and everything you need to know for Game 3.

For the second time in three seasons, Heat and Celtics will play in the East finals. In the West, the veteran Warriors face the upstart Mavericks.

We know what to expect from stars Steph Curry, Jayson Tatum, Luka Doncic and Jimmy Butler in the next round. But which role players are key factors?