5 6 ▁but ▁represent ▁the ▁NO C s ▁with ▁four ▁higher - rank ed ▁players ▁already ▁particip ating ▁do ▁not ▁qual ify , ▁allowing ▁players ▁who ▁are ▁ranked ▁outside ▁of ▁the ▁top ▁ 5 6 ▁but ▁from ▁countries ▁with ▁fewer ▁than ▁four ▁players ▁already ▁qualified ▁to ▁comp ete . ▁A ▁player ▁could ▁only ▁particip ate ▁if ▁they ▁made ▁themselves ▁available ▁to ▁be ▁draft ed ▁to ▁represent ▁their ▁country ▁in ▁Davis ▁Cup ▁or ▁Fed ▁Cup ▁for ▁two ▁of ▁the ▁following ▁years : ▁ 2 0 1 7 , ▁ 2 0 1 8 , ▁ 2 0 1 9 , ▁and ▁ 2 0 2 0 , ▁with ▁one ▁of ▁the ▁years ▁being ▁either ▁ 2 0 1 9 ▁or ▁ 2 0 2 0 . ▁Six ▁of ▁the ▁remaining ▁eight ▁sl ots ▁will ▁be ▁allocated ▁by ▁continent : ▁two ▁in ▁the ▁ 2 0 1 9 ▁Pan ▁American ▁Games , ▁one ▁in ▁the ▁ 2 0 1 8 ▁Asian ▁Games , ▁one ▁in ▁the ▁ 2 0 1 9 ▁African ▁Games , ▁and ▁one ▁each ▁for ▁Europe ▁and ▁O ce ania ▁for ▁the ▁highest - rank ed ▁ath lete ▁from ▁an ▁NO C ▁with ▁no ▁other ▁qual ifiers . ▁The ▁final ▁two ▁sp ots ▁are ▁reserved , ▁one ▁for ▁the ▁host ▁nation ▁and ▁one ▁for ▁a ▁previous ▁Olympic ▁gold ▁medal ist ▁or ▁Grand ▁S lam ▁champion . ▁ ▁In ▁the ▁men ' s ▁and ▁women ' s ▁doubles ▁compet itions , ▁ 3 2 ▁teams ▁qual ify . ▁Up ▁to ▁ 1 0