Olympics overnight (Sunday, Aug 21): Golden girl Nicola Adams | Mighty Mo | GB top London tally

LEEDS boxer Nicola Adams won her second gold, Mo Farah his fourth and sprint canoeist Liam Heath his first as Great Britain surpassed their London 2012 medal tally on the penultimate day of the Rio Olympics.

Great Britain's Nicola Adams with her gold medal
Great Britain's Nicola Adams with her gold medal

There were bronze medals for triathlete Vicky Holland, taekwondo fighter Bianca Walkden and the women’s 4x400m relay squad.

Third in the relay saw Britain take a 66th podium place of Rio 2016 to surpass the haul of 65 medals from four years ago. Boxer Joe Joyce is guaranteed another medal on today’s final day.

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Britain are also on course to finish above China in the overall medals table, although diver Tom Daley’s premature exit handed China’s Chen Aisen gold.

Great Britain's Mo Farah celebrates winning the men's 5000m final

Here, we review Saturday’s action and list today’s highlights:

* Farah completed his long-distance ‘double double’ by adding the 5,000m gold to the 10,000m he won in Rio last weekend and the two triumphs at London 2012. The 33-year-old Londoner held off the United States’ Paul Kipkemoi Chelimo on the final bend to sprint clear and become only the second man after ‘Flying Finn’ Lasse Viren to win both titles at two Games. Andrew Butchart was sixth.

* Adams became the first British boxer to retain an Olympic title in 92 years by outpointing Sarah Ourahmoune of France to claim flyweight gold. The 33-year-old from Leeds emulated Harry Mallin, who won back-to-back gold medals in 1920 and 1924.

* Heath powered his way to Olympic gold in the K1 200 metres. The 32-year-old made it third time lucky after winning silver alongside Jon Schofield in the K2 200m, to go with his bronze in the same class from London 2012.

Great Britain's Mo Farah celebrates winning the men's 5000m final

* Brazil atoned for their 7-1 humiliation at the World Cup to Germany with a penalty shootout victory as Neymar converted the decisive spot-kick. Neymar, ruled out of 2014’s meeting through injury, kept his cool after a match drawn 1-1 after extra time at the Maracana Stadium to send the host nation into raptures.

* South Africa’s Caster Semenya, who found herself at the centre of a gender row following her victory at the 2009 World Championships and had to undergo gender testing before being cleared to return to competition, claimed gold in the women’s 800m final. Lynsey Sharp, who earlier this summer claimed the 800m had become two different races, finished sixth.

* Holland outsprinted best friend and housemate Non Stanford to win triathlon bronze. USA’s Gwen Jorgensen took gold.

* Walkden outpointed Wiam Dislam of Morocco 7-1 to become the third member of the British taekwondo team to win a medal after Jade Jones and Lutalo Muhammad. Mahama Cho missed out, beaten by Brazil’s Maicon Siqueira to become the 17th Briton to finish fourth at the Games.

* The women’s 4x400m relay squad of Eilidh Doyle, Anyika Onuora, Emily Diamond and Christine Ohuruogu dug in to finish third behind the USA and Jamaica and clinch Britain’s 66th podium place of the Games.

* Daley’s bid for Olympic gold in Rio ended after he failed to qualify from the semi-finals of the 10 metres platform event, despite topping the preliminary round rankings the day before. The 22-year-old from Plymouth vowed to continue on to Tokyo.

Coming up on Sunday’s final day of the Games:

* Joyce is in the super-heavyweight final with France’s Tony Yoka at 1715BST

* The men’s marathon, which starts at 1.30pm BST, features three Britons: Callum and Derek Hawkins and Tsegai Tewelde.

* Grant Ferguson is in the men’s cross-country mountain bike event, which starts at 4.30pm and features road world champion Peter Sagan of Slovakia.