Dirk Nowitzki

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Portland Trail Blazers forward Thomas Robinson, left, and Dallas Mavericks forward Dirk Nowitzki, right, of Germany, fight for a loose ball during the first half of an NBA basketball game on Friday, March 7, 2014, in Dallas. (AP Photo/John F. Rhodes)

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Dallas Mavericks forward Dirk Nowitzki (41) holds the ball away from Denver Nuggets center J.J. Hickson (7) in the second quarter of an NBA game in Denver on Wednesday, March 5, 2014.(AP Photo/Joe Mahoney)

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Dallas Mavericks' forward Dirk Nowitzki (41) looks to pass as New Orleans Pelicans' Austin Rivers (25) defends during the first half of an NBA basketball game on Wednesday, Feb. 26, 2014, in Dallas. (AP Photo/Brandon Wade)

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New Orleans Pelicans' guard Austin Rivers, center, battles Dallas Mavericks' Vince Carter, left, and Dirk Nowitzki (41) for space during the first half of an NBA basketball game on Wednesday, Feb. 26, 2014, in Dallas. (AP Photo/Brandon Wade)

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Dallas Mavericks' Jose Calderon, left celebrates with teammate Dirk Nowitzki (41) after scoring against the New York Knicks during the first half of an NBA basketball game, Monday, Feb. 24, 2014, in New York. (AP Photo/Jason DeCrow)

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Dallas Mavericks' Dirk Nowitzki (41) works against New York Knicks' Amar'e Stoudemire, left, during the first half of an NBA basketball game, Monday, Feb. 24, 2014, in New York. (AP Photo/Jason DeCrow)

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New York Knicks' Tim Hardaway, Jr., center, drives against Dallas Mavericks' Devin Harris, left, and Dirk Nowitzki during the first half of an NBA basketball game, Monday, Feb. 24, 2014, in New York. (AP Photo/Jason DeCrow)

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Dallas Mavericks' Dirk Nowitzki, left, of Germany, shoots as Philadelphia 76ers' James Anderson, right, defends during the first half of an NBA basketball game, Friday, Feb. 21, 2014, in Philadelphia. (AP Photo/Chris Szagola)

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Dallas Mavericks' Dirk Nowitzki, right, of Germany shoots while being guarded by Philadelphia 76ers' Thaddeus Young, left, during the first half of an NBA basketball game, Friday, Feb. 21, 2014, in Philadelphia. (AP Photo/Chris Szagola)

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Miami Heat forward Michael Beasley (8) and Dallas Mavericks forward Dirk Nowitzki (41) reach for a loose ball during the first half of an NBA basketball game Tuesday, Feb. 18, 2014, in Dallas. (AP Photo/LM Otero)

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Miami Heat forward Shane Battier (31) reaches in for ball against Dallas Mavericks forward Dirk Nowitzki (41) during the first half of an NBA basketball game Tuesday, Feb. 18, 2014, in Dallas. (AP Photo/LM Otero)