Pictured is a mural featuring basketball greats Luka Doncic and Dirk Nowitzki, and boxing champion Errol Spence Jr. by artist Art Velazquez in Oak Cliff, Dallas, Texas. Luka Doncic is a Slovenian professional basketball player for the Dallas Mavericks of the National Basketball Association. He also represents the Slovenian national team. Dirk Nowitzki is widely regarded as one of the greatest power forwards of all time and is considered by many to be the greatest European player of all time. The big German is now retired after playing 21 seasons for the Dallas Mavericks and is a future hall of famer. Errol Spence Jr. is an American professional boxer. He is currently a unified welterweight world champion.