Trailing 53-43 at the half, the Spurs used Duncan's performance to outscore the Clippers 26-8 in the third quarter and then went on to take a commanding 3-0 lead over LA in their Western Conference semifinals series.
Duncan grabbed 13 rebounds and Tony Parker had 23 points and 10 assists for the top-seeded Spurs, who sank nine 3-pointers.
Kawhi Leonard added 14 points and nine boards and Manu Ginobili scored 13 points for San Antonio.
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