0 ▁events ▁in ▁ 2 0 1 1 ▁counted ▁towards ▁the ▁ranking . ▁All ▁direct ▁accept ance ▁players ▁at ▁the ▁time ▁of ▁the ▁entry ▁dead line ▁who ▁did ▁not ▁play ▁an ▁event ▁receive ▁a ▁ 0 - pointer ▁for ▁that ▁event . ▁The ▁Monte ▁Carlo ▁Ro lex ▁Masters ▁ 1 0 0 0 ▁became ▁optional ▁in ▁ 2 0 0 9 , ▁but ▁if ▁a ▁player ▁chose ▁to ▁particip ate ▁in ▁it , ▁its ▁result ▁was ▁counted ▁in ▁and ▁the ▁fourth - best ▁result ▁in ▁an ▁ATP ▁ 5 0 0 ▁event ▁was ▁ignored ▁( the ▁three ▁best ▁ATP ▁ 5 0 0 ▁results ▁remained ). ▁If ▁a ▁player ▁did ▁not ▁play ▁enough ▁ATP ▁ 5 0 0 ▁events ▁and ▁did ▁not ▁have ▁an ▁ATP ▁ 2 5 0 ▁or ▁Ch allen ger ▁appearances ▁with ▁a ▁better ▁result , ▁the ▁Davis ▁Cup ▁was ▁counted ▁in ▁the ▁ 5 0 0 s ▁table ▁( if ▁the ▁player ▁entered ▁or ▁achieved ▁better ▁results ). ▁If ▁a ▁player ▁did ▁not ▁play ▁enough ▁ATP ▁ 2 5 0 ▁or ▁Ch allen ger ▁events , ▁the ▁World ▁Team ▁Championship ▁was ▁counted ▁in ▁the ▁ 2 5 0 s ▁table ▁( if ▁the ▁player ▁entered ▁or ▁achieved ▁better ▁results ). ▁If ▁a ▁player ▁could ▁not ▁be ▁present ▁in ▁all ▁required ▁tournament ▁classes ▁( i . e . ▁because ▁of ▁an ▁injury ), ▁all ▁un count ed ▁ATP ▁ 2 5 0 ▁or ▁Ch allen ger ▁results ▁were ▁el ig ible ▁to ▁be ▁included ▁in ▁the ▁ 1 8 ▁valid