Wizards forward Kevin Seraphin has a target on his back now and he knows it. The 22-year-old scored 19 points with seven rebounds in an 89-86 loss to the Boston Celtics on Saturday at Verizon Center. Boston’s Kevin Garnett, now 36, hasn’t mellowed much in his old age. He will be ready when Seraphin returns with Washington on Wednesday night for a rematch at TD Garden.

“I score 19 points. I know he won’t let me score 19 points again,” Seraphin said with a smile after Tuesday’s practice at Verizon Center. “And for me that’s a challenge because I have to do it again.”

Wizards coach Randy Wittman, a former assistant coach with the Minnesota Timberwolves during Garnett’s first four seasons in the NBA with that club, calls the star center “the best competitor I’ve ever been around.”

If Seraphin needed proof he need only look back to Saturday’s contest against Boston. After a timeout was called he took an extra shot – something that happens a dozen times in every NBA game. Garnett blocked it. It’s not the first time in his career he’s tried to intimidate a younger player with the move. The man plays hard even after the whistle. And the Wizards wouldn’t mind at all if some of that rubs off on their young project, a first-round pick in 2010 who has just 116 NBA games to his name.

“When they called time out and you still tried to shot every time he’d come and he won’t let you,” Seraphin said of his last encounter with Garnett, who otherwise didn’t do much trash talking during the game. “I just say ‘Next time I will just put it higher and see.’”

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