Novak Djokovic, Rafael Nadal and Carlos Alcaraz all are on the Paris Olympics' tennis schedule Saturday, the first day of action at Roland Garros. Serbia's Djokovic will compete in singles only, Nadal in doubles only and Alcaraz in both. Nadal and Alcaraz are teammates in doubles for Spain and will face Maximo Gonzalez and Andres Molteni of Argentina at Court Philippe Chatrier during the night session.