In a complete show of domaince, Great Britain secured gold and silver in the men's Triathlon, with Alistair Brownlee leading his brother Jonathan home in a time of 1.45:01 hours.
Alistair, who has defended the title he won in London four years ago made the decisive kick with around 5,000 metres of running to go, as the Brownlee's became the first set of brothers to finish 1-2 at Summer Olympics since Rome in 1960.
Henri Schoeman of South Africa finished in third, 43 seconds behind Alistair, with Spain's Mario Mola down in eighth despite coming into the race as the Brownlee's main rivals.
Varga leads home swim as Brownlee's hit front group
Just as expected, Slovakian Richard Varga made the early running during the open-water swim.
A teammate of the Brownlee's based in Leeds, Varga hit the front early over the 1.5km's freestyle and with the injured Javier Gomes not able to compete due to a broken arm it was expected that the brothers from Leeds would try to set the pace.
They did just that, and after the first transition from the water to the bike, they managed to find themselves in a lead group of ten which had managed to eak out 16 seconds from the rest of the race.
With 40km of cycling in front of them, the Brownlee's injected pace into the leading group, and with the help of Vincent Luis of France, they had soon moved the lead out to over a minute from their main rivals who were struggling to make inroads on the bike.
8 laps of the bike course included a gruelling climb and descent on each circuit, and with the Brownlee's constantly showing their face at the front of the race, the gap back to the main peloton which included dangerous runners in the form of Mola and Richard Murray (South Africa) stayed stagnant at around 75 seconds.
Alistair kicks over final 5,000 of run to retain title
The transition from the bike to the 10km run went well for the Team GB duo, and alongside Luis they managed to put a couple of seconds into the rest of the lead group.
Mola and Murray were still over a minute back which all-but ended their hopes of a medal, and during the first lap of four, Luis was dropped by the Brownlee's who looked destined for a 1-2 finish.
Just after the halfway stage of the run, Alistair made the decisive move which secured him the gold, leaving Jonny behind and soon having a comfortable lead which he maintained through to the finish line.
All of the work put in to stay at the front of the swim, and then extending the lead while on the bike made all the difference, and in truth, not one man looked capable of beating the Brownlee brothers.
Defending his title, Alistair grabbed the British and Yorkshire flag as he waltzed over the line, with Jonny following soon after ahead of the South African duo of Schoeman and Murray.