▁testing ▁positive ▁for ▁c oca ine . ▁Tra ces ▁of ▁the ▁drug ▁were ▁found ▁in ▁a ▁ur ine ▁sample ▁taken ▁in ▁March ▁ 2 0 0 9 . ▁In ▁July ▁ 2 0 0 9 , ▁he ▁was ▁cleared ▁to ▁return ▁to ▁compet itive ▁tennis ▁after ▁a ▁trib unal ▁found ▁that ▁" the ▁c oca ine ▁entered ▁his ▁system ▁through ▁in ad vert ent ▁cont am ination ▁in ▁a ▁night club ". ▁Gas quet ▁suggested ▁that ▁the ▁c oca ine ▁entered ▁his ▁system ▁after ▁he ▁French - k iss ed ▁a ▁stri pper ▁in ▁a ▁Miami ▁night club . ▁The ▁trib unal ▁stated ▁that ▁the ▁quantity ▁of ▁c oca ine ▁detected ▁in ▁Gas quet ' s ▁sample ▁was ▁" very ▁small , ▁about ▁the ▁size ▁of ▁a ▁gra in ▁of ▁salt " ▁ ▁Gas quet ▁made ▁his ▁return ▁to ▁the ▁tour ▁at ▁the ▁Pil ot ▁Pen ▁championship ▁in ▁New ▁H aven ▁to ▁qual ify ▁for ▁the ▁main ▁draw , ▁but ▁lost ▁in ▁the ▁second ▁round ▁of ▁qual ifying . ▁Play ing ▁his ▁first ▁Grand ▁S lam ▁since ▁January , ▁Gas quet ▁drew ▁Rafael ▁Nad al ▁in ▁the ▁first ▁round ▁of ▁the ▁US ▁Open ▁and ▁lost ▁in ▁straight ▁sets . ▁ ▁Gas quest ▁made ▁a ▁solid ▁run ▁at ▁his ▁next ▁tournament , ▁the ▁Open ▁de ▁Mos elle ▁in ▁Met z , ▁be ating ▁Michael ▁Ber rer , ▁Christ ophe ▁Ro chus ▁and ▁Philipp ▁Pet z sch ner ▁to ▁reach ▁his ▁first ▁ATP ▁semif inals ▁since ▁January , ▁and ▁lost ▁to ▁event ual ▁winner ▁Ga