Dirk Nowitzki

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Dallas Mavericks forward Dirk Nowitzki (41) of Germany drives against Minnesota Timberwolves forward Dante Cunningham (33) during the first half an NBA basketball game Wednesday, March 19, 2014, in Dallas. (AP Photo/LM Otero)

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Minnesota Timberwolves forward Corey Brewer (13) drives against Dallas Mavericks forward Dirk Nowitzki (41) of Germany during the first half an NBA basketball game Wednesday, March 19, 2014, in Dallas. (AP Photo/LM Otero)

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Dallas Mavericks forward Dirk Nowitzki (41) of Germany looks to pass against Boston Celtics center Kelly Olynyk (41) during the first half an NBA basketball game Monday, March 17, 2014, in Dallas. (AP Photo/LM Otero)

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Dallas Mavericks forward Dirk Nowitzki (41) shoots over Oklahoma City Thunder forward Serge Ibaka (9) in the first quarter of an NBA basketball game in Oklahoma City, Sunday, March 16, 2014. (AP Photo/Sue Ogrocki)

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Dallas Mavericks' Dirk Nowitzki, left, shoots as Utah Jazz's Jeremy Evans (40) looks on in the second quarter during an NBA basketball game Wednesday, March 12, 2014, in Salt Lake City. (AP Photo/Rick Bowmer)

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Dallas Mavericks' Dirk Nowitzki (41) looks on after scoring against the Utah Jazz in the second quarter during an NBA basketball game Wednesday, March 12, 2014, in Salt Lake City. (AP Photo/Rick Bowmer)

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Golden State Warriors' Steve Blake, right, passes around Dallas Mavericks' Dirk Nowitzki, of Germany, during the first half of an NBA basketball game Tuesday, March 11, 2014, in Oakland, Calif. (AP Photo/Ben Margot)

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Dallas Mavericks power forward Dirk Nowitzki (41), of Germany, shoots the ball over Indiana Pacers' Luis Scola (4), of Argentina, during the first half of an NBA game, Sunday, Mar. 9, 2014, in Dallas, Texas. (AP Photo/Jim Cowsert)

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Troy Aikman, Roger Staubach, Dirk Nowitzki, Rolando Blackman and Michael Young congratulate Mike Modano as Modano's No. 9 Dallas Stars jersey is retired, before the NHL hockey game between the Stars and the Minnesota Wild in Dallas on Saturday, March 8, 2014. (AP Photo/ Richard W. Rodriguez)

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Portland Trail Blazers center Robin Lopez (42) shoots as Dallas Mavericks forward Dirk Nowitzki (41), of Germany, defends during the first half of an NBA basketball game on Friday, March 7, 2014, in Dallas. (AP Photo/John F. Rhodes)