Rafael Nadal’s Olympic singles career is over after he was blown away 6-1, 6-4 by arch-rival Novak Djokovic in the Paris second round on Monday. The Spaniard is still in the doubles along with compatriot and heir Carlos Alcaraz but whether he will be seen on a singles court again remains to be seen. “I will give my best every day. If I decide that I don’t want to play anymore, I will let you know,” he told reporters. The injury-prone 38-year-old has said this season is probably his last and having gone out of the French Open in May in the first round, skipping Wimbledon and then bowing out ear…