Today Luka Dončić turns 21. @mcuban … Today Luka Dončić turns 21. @mcuban explains why the young star has the “opportunity to be one of the greats” for the @dallasmavs #MFFL Today Luka Dončić turns 21. @mcuban explains why the young star has the "opportunity to be one of the greats" for the @dallasmavs #MFFL pic.twitter.com/e4pBxfH6Un — SiriusXM NBA Radio (@SiriusXMNBA) February 28, 2020