Boston Celtics down Dallas Mavericks to take 2-0 series lead in NBA Finals.

Jrue Holiday had 26 points and 11 rebounds, and Jayson Tatum made up for a rough shooting night with 12 assists and nine rebounds as the Celtics beat the Dallas Mavericks 105-98 in Boston on Sunday night to take a 2-0 lead in the NBA Finals.   Luka Doncic, who was listed as questionable to play less than two hours before the opening tipoff, scored 32 points with 11 rebounds and 11 assists — the first NBA Finals triple-double in Mavericks franchise history. But he missed a one-footed, running floater…