Rio de Janeiro, State of Rio de Janeiro, Brazil, 7 August 2016 | tennis.com.au

John Millman did not relinquish a single game in a dominant start to his Olympic campaign.

One of four Aussies in men’s singles action at Rio 2016, Millman blitzed Ricardas Berankis 6-0 6-0 to advance to the second round.

Good to get the win today. Now in the Aussie Hub watching our Hockeyroos and Sharks play. #OneTeam pic.twitter.com/f3OHpYeQSo

— John Millman (@johnhmillman) August 7, 2016

The Queenslander will next face fourth seed Kei Nishikori of Japan after Nishikori beat Spaniard Albert Ramos-Vinolas in straight sets.

Aussie @johnhmillman made Olympic history in the #tennis with the #OlympicGames' first 6-0, 6-0 win: https://t.co/VF3lplbViP #Rio2016

— ABC Grandstand (@abcgrandstand) August 7, 2016

The news was not so good for the other Aussies, however, with Thanasi Kokkinakis and Jordan Thompson both falling in their opening round matches.

Thompson went down 6-4 6-2 to Brit Kyle Edmund while Kokkinakis, playing his first match in 10 months, was competitive in a 7-6(4) 7-6(3) loss to Gastao Elias of Portugal.

In doubles, Chris Guccione and John Peers fell 6-4 7-5 to Argentineans Juan Martin del Potro and Maximo Gonzalez, while Rodionova sisters Anastasia and Arina lost 6-1 6-2 to seventh seeds Ekaterina Makarova and Elena Vesnina of Russia.

Later on Saturday, Sam Stosur and Daria Gavrilova stretched fifth seeds Martina Hingis and Timea Bacsinszky of Switzerland to three sets before losing 6-4 4-6 6-2.