Paris Olympics: Djokovic, Alcaraz close in on finals showdown as Nadal exits

           PARIS – Novak Djokovic and Carlos Alcaraz overcame crushing humidity on Wednesday to stay on course for an Olympic final showdown as Rafael Nadal played possibly his final match at Roland Garros. Djokovic, seeking a first Olympic title, defeated German left-hander Dominik Koepfer 7-5, 6-3, becoming the first man to reach four singles