Dirk Nowitzki

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San Antonio Spurs' Manu Ginobili (20), of Argentina shoots over Dallas Mavericks' Dirk Nowitzki (41), of Germany, during the first quarter of Game 1 of the opening-round NBA basketball playoff series on Sunday, April 20, 2014, in San Antonio. (AP Photo/Eric Gay)

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San Antonio Spurs' Tony Parker (9), of France, shoots around Dallas Mavericks' Dirk Nowitzki (41), of Germany, during the first quarter of Game 1 of the opening-round NBA basketball playoff series on Sunday, April 20, 2014, in San Antonio. (AP Photo/Eric Gay)

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ADVANCE FOR WEEKEND EDITIONS, APRIL 20-21 - FILE - In this Feb. 26, 2014 file photo, Dallas Mavericks' forward Dirk Nowitzki (41) battles New Orleans Pelicans' Al-Farouq Aminu (0) during the second half of an NBA basketball game in Dallas. While it will take a major upset for the Mavericks to get past top-seeded San Antonio in the first round, Nowitzki looks like he could be around for two or three more runs at a second title. (AP Photo/Brandon Wade, File)

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ADVANCE FOR WEEKEND EDITIONS, APRIL 20-21 - FILE - In this April 8, 2014 file photo, Dallas Mavericks' Dirk Nowitzki (41) shoots as Utah Jazz's Marvin Williams, left, defends in the first quarter during an NBA basketball game in Salt Lake City. While it will take a major upset for the Mavericks to get past top-seeded San Antonio in the first round, Nowitzki looks like he could be around for two or three more runs at a second title. (AP Photo/Rick Bowmer, FIle)

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Memphis Grizzlies guard Tony Allen (9) shoots against Dallas Mavericks defenders Devin Harris (20); Dirk Nowitzki, rear, of Germany; and Jae Crowder (9) in the second half of an NBA basketball game Wednesday, April 16, 2014, in Memphis, Tenn. The Grizzlies won in overtime, 106-105. (AP Photo/Lance Murphey)

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Memphis Grizzlies forward Tayshaun Prince (21) gets tangled with Dallas Mavericks guard Monta Ellis (11) and forward Dirk Nowitzki, of Germany, in the second half of an NBA basketball game Wednesday, April 16, 2014, in Memphis, Tenn. The Grizzlies won in overtime 106-105. (AP Photo/Lance Murphey)

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Dallas Mavericks forward Dirk Nowitzki (41), of Germany, cries out after scoring against the Memphis Grizzlies in the second half of an NBA basketball game Wednesday, April 16, 2014, in Memphis, Tenn. The Grizzlies won in overtime 106-105. (AP Photo/Lance Murphey)

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Memphis Grizzlies forward Zach Randolph (50) goes to the basket against Dallas Mavericks forward Dirk Nowitzki (41), of Germany, in the second half of an NBA basketball game Wednesday, April 16, 2014, in Memphis, Tenn. The Grizzlies won in overtime 106-105. (AP Photo/Lance Murphey)