PHOENIX (Ticker) -- The Boston Celtics broke through when the Phoenix Suns broke down.Antoine Walker had 33 points and 13 rebounds and Paul Pierceadded 25 and 12 as the Celtics posted a 120-113 overtime triumphover the Suns, who lost at home to an Eastern Conferenceopponent for the first time this season.Boston shook a disappointing final two minutes of regulation bydominating defensively in overtime. Phoenix missed its firstsix shots in the extra session and looked totally out of sortswithout injured point guard Steve Nash and starting center AmareStoudemire, who fouled out early in the fourth quarter.Suns coach Mike D'Antoni was ejected in the final seconds ofovertime and three players received technicals. Phoenix alsocommitted 19 turnovers and missed 17 of 23 3-point attempts.Stoudemire had 27 points and Joe Johnson added 21 for the Suns,who were 12-0 at home against teams from the East in 2004-05.Rookie Delonte West had a season-high 19 points and Ricky Davisadded 16 for Boston, which beat Phoenix for just the second timein the last seven meetings.