The long hug at the net between Great Britain's Andy Murray and Juan Martin del Potro, of Argentina, said it all.

The two had just slogged it out and given their all in a four-hour battle for Olympic gold, with Murray finally prevailing 7-5 4-6 6-2 7-5.

In doing so, the Scot became the first tennis player to win two Olympic men's singles titles.

The rollercoaster match featured 14 breaks of serve in front of a raucous crowd and Murray's win comes five weeks after he claimed his second Wimbledon title and four years after London 2012 success.

Michael Johnson
Four-time Olympic gold medallist athlete on BBC One

Van Niekerk is so young, what else can he do? Can he go under 43 seconds? It is something I thought I could do, but never did.

Usain Bolt will be retiring soon, this could be the next star.

Great Britain's 400m runner Martyn Rooney won't be taking Wayde van Niekerk's words lightly in future...

Michael Johnson...sorry, Mr Johnson, Lord of the Track, Sir Spikes... your 17-year-old world record in the 400m has gone. 

But he didn't seem bothered. He immediately tweeted his congratulations to the new Olympic champion Wayde van Niekerk. 

It was a pretty special night in the athletics at Rio 2016 last night and not just because of the great man Usain Bolt. 

Before Bolt took to the track, South Africa's Wayde van Niekerk wowed the watching world when he broke Michael Johnson's 17-year-old 400m world record to sensationally win Olympic gold.

The 24-year-old finished in 43.03 seconds, 0.15 quicker than the time Johnson clocked in Seville in 1999.

Grenada's Kirani James, the London 2012 champion, finished 0.73 behind to take the silver medal, with American LaShawn Merritt in bronze. 

It was truly amazing and deserves a watch...

This was sent shortly after his gold medal-winning race. Talk about multi-tasking...

Usain Bolt did it again. The Jamaican became the first athlete to win three Olympic 100m titles by beating American Justin Gatlin to gold at Rio 2016.

Bolt, 29, ran 9.81 seconds in his final Olympics to replicate his success at Beijing 2008 and London 2012.

Gatlin, twice banned for doping offences, finished 0.08 seconds behind Bolt to take silver.

"Somebody said I can become immortal. Two more medals to go and I can sign off. Immortal," said Bolt.

What's happening on Monday, I hear you cry. 

Here's the main events.

• 13:30: Swimming Women's 10km marathon - Great Britain's Kerri-Anne Payne competes in the open water event.
• 13:38: Athletics Women's 200m - First round round featuring GB's Dina-Asher Smith.
• 14:00 Dressage - British riders Charlotte Dujardin and Carl Hester in the Individual Grand Prix. Concludes around 17.30.
• 21.23: Cycling - Mark Cavendish, third after day one, seeks his first Olympic medal in the men's omnium. Concludes around 22:30.
• 22:00 Women's hockey - Great Britain take on Spain in the quarter-finals of the women's hockey.
• 02:25: Athletics Men's 800m - Kenya's David Rudisha bids to repeat his London 2012 display and retain the men's 800m title.
• 02:45: Athletics Women's 400m - American six-time Olympic medallist Allyson Felix targets her first 400m Olympic gold. She stepped up after winning the 200m at London 2012.  

Here's how we're moving and shaking going into day 10...

Image source, .

On your marks.

Set.

WATCH.