Venus and Serena Williams today became the first players to win four Olympic tennis titles after being crowned women's doubles champions at London 2012.
Less than 24 hours after Serena joined older sister Venus as a three-time gold medallist with a crushing victory in the singles - completing the career golden slam in the process - the United States pair saw off Czech Republic duo Andrea Hlavackova and Lucie Hradecka 6-4 6-4.
Today's match was a repeat of last month's Wimbledon final, which the sisters also won in straight sets on Centre Court.
The Americans broke serve in the very first game under a closed roof this afternoon and although they were forced to save more than one break-back point, they held on to take the opening set.
Hlavackova and Hradecka had chances to break early in the second set before dropping serve themselves in game five and the Williamses never looked back.
The American sisters, who also won doubles gold in Beijing and Sydney, took an hour and a half to wrap up their defeat of the number four seeds.
"There's something about standing next to Venus and holding that gold medal. Three times we have played, three times we have got the gold medal" - Serena Williams
The Czech pair saved two match points before Venus secured the victory with a backhand volley, hugging her sister in celebration as chants of "USA! USA!" rang out from the crowd.
With Venus also having won singles gold in Sydney, the pair have overtaken previous record holder Briton Reginald Doherty, who won a total of three golds in 1900 and 1908.
"It's incredible. After coming off Serena's victory I think most of all we are happy to add to our country's medal count and be a part of it. Wow. It just feels unreal," said Venus, who is already thinking about adding a fourth doubles gold to the collection at the 2016 Games.
"We're definitely planning on Rio. We're going out with a bang in Rio. Hopefully we will make it four, you never know."