Andy Murray of Great Britain has been here before. Juan Martin del Potro of Argentina has not.
However, just because Murray has played for and won the Olympic gold medal before does not mean he is going to have an easy time of it.
While Murray has played well in Rio de Janeiro and has reached the final after downing Japan's Kei Nishikori by a 6-1, 6-4 score on Saturday, Del Potro scored perhaps an even more impressive victory over Rafael Nadal, as he came back to beat the Spaniard 5-7, 6-4, 7-6 (7-5) in a thrilling match.