Paul Pierce scored nine of his season-high 39 points in overtime as the Boston Celtics beat the Toronto Raptors for the second consecutive day, 115-109 Monday night.

One day after Ray Allen's 36 points led Boston to a 94-88 win in Toronto, Pierce led a comeback from a 10-point deficit midway through the third quarter to carry the Celtics to their second straight win after losing four in a row.

Pierce also had nine rebounds, while Kevin Garnett added 20 points and 12 rebounds.

Andrea Bargnani, whose three-pointer with one second left sent the game into overtime tied at 93, led the Raptors with 23 points, and Chris Bosh had 18 points and 11 rebounds.

The Celtics never trailed in overtime as Pierce scored the first basket, a three-pointer. After Anthony Parker sank a turnaround shot from the baseline, Pierce connected from the top of the key for a 98-95 lead. Boston led by at least three points the rest of the way.

Fast facts
• Andrea Bargnani finished with 23 points. He is averaging 20.6 points per game in January.

• Celtics forward Kevin Garnett scored 20 points, surpassing the 21,000 mark for his career.

• Boston has won 11 of its last 13 home games against the Raptors, including two straight.

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