John McEnroe, Ivan Lendl, the Williams sisters and many other talented pros have built collections spanning Basquiat, Mucha, Warhol and beyond after leaving the tour behind.
Taken together, the results paint a vivid portrait of a market that is coming of age without losing its appetite and building lasting value and legacy rather than chasing speculative heat.
"Often when people say African artists are new, they neglect that African artists have been a part of the story forever," cofounder Kwame Mintah tells Observer.