James Harden totalled 34 points, 10 assists and 10 rebounds as the Brooklyn Nets pulled away in the fourth quarter and closed out their Eastern Conference first-round series with a 123-109 victory over the Boston Celtics on Tuesday night in New York.The second-seeded Nets won the series four games to one and advanced to the conference semifinals for the first time since 2014. Brooklyn will face the third-seeded Milwaukee Bucks in the second round.Harden made 10 of 17 shots and posted his fourth career postseason triple-double and 11th by a Net. The other 10 were achieved by Hall of Famer Jason Kidd. Harden also posted the first 30-point triple-double in Nets history and joined Dallas guard Luka Doncic as the second player to get a 30-point triple-double in this year’s postseason.