Swimming at the 1968 Ciudad de México Summer Games:

Roland Matthes of the GDR had already won the 100 backstroke in Mexico City, and had set two world records in this event in Leipzig, in 1967 and earlier in 1968. The early pace in the final was set by Mitch Ivey and Jack Horsley of the United States and they still led at 150 metres, Matthes just behind. But on the final lap Matthes increased his turnover and pulled away to a full second victory over Ivey, with Horsley taking the bronze, Gary Hall of the USA placing fourth. In 1972 Matthes would repeat in this event at Munich and also win the 100 back, taking the backstroke double-double in 1968-72.