MIAMI (Reuters) - LeBron James powered Miami to a 98-90 win over the Atlanta Hawks on Monday as the Heat clinched the No.2 seeding in the NBA's Eastern Conference.

With Boston losing 95-94 against Washington, Miami's (57-24) win set up a postseason match-up with the No. 7 seed Philadelphia.

James scored 34 points, grabbed 10 rebounds and had seven assists for the Heat, who had relegated the Celtics to third in the conference after a 100-77 mauling on Sunday.

"This game was just as important as yesterday's, because it was drawing closer to wrapping up the two seed," Heat guard Dwyane Wade told reporters.

Wade scored 21 points, and Miami also got 15 points and nine rebounds from Chris Bosh, the final member of the team's 'Big Three'.

(Writing by Jahmal Corner in Los Angeles; Editing by Peter Rutherford)