FANS IN OLYMPIC PARK WATCH USAIN BOLT WIN 100M HEAT
Sports fans in Barra Olympic Park all stopped to watch big screens showing Jamaica's Usain Bolt cruise to a win in his 100m heat on a sunny Saturday afternoon. Bolt stopped the clock at 10.07 seconds. But he wasn't the fastest runner during the first round of competition: American rival Justin Gatlin qualified first with a time of 10.01.

The men's 100m semi-finals will take place on Sunday evening in the Olympic Stadium.

BOLT SLOW TO GET GOING
Usain Bolt won his heat in a time of 10.07 but was made to work during the middle section of the race.

The reigning Olympic champion sat in the blocks and took his time working through the field. He eased across the line but the 100m is shaping up to be an interesting affair if the heats are anything to go by - which they are usually not. 

YOHAN BLAKE LOOKS SMOOTH IN HEAT 6
Another of Usain Bolt's main rivals for gold, Yohan Blake did not need to exert much energy in his heat. The silver medallist at London 2010 began to ease up at about the 50m mark, winning in a time of 10.11 seconds.

Blake has struggled with injuries recently, but he is sure looking good right now.

HOUSE OF SWITZERLAND CELEBRATES BOLT'S OPENING DAY
Team Switzerland's house is basking in the glorious Rio sun today and, like the rest of us, is looking forward to Usain Bolt's Rio 2016 debut. Located next to the Lagoa Rodrigo de Freitas, the House of Switzerland has installed a special running track for children. With an electronic starting pistol and the same photo finish used by Omega at the Games, the hope is to inspire young people to take up athletics.

JUSTIN GATLIN EASES THROUGH HEAT 2
If we wanted an indication of Justin Gatlin's fitness, it's fair to say he's not looking bad after his heat 2 race. The man touted to be one of Usain Bolt's closest contenders just clocked a lerthargic 10.01 to progress to the semi-finals. 

WORLD RECORD ALERT: WOMEN'S TEAM PURSUIT ROUND FOUR
Track cycling: the world record for the women's team pursuit has changed hands twice this morning. In round four, Team USA took it in heat three, with a time of 4:12.282. But team Great Britain responded with 4:12.152 to reclaim their own record.
 

TEAM GREAT BRITAIN TAKE MEN'S EIGHT
And Team GB's men have done one better than the women did earlier and taken gold in the men's eight at the Lagoa. Beating the German team by over a second. Netherlands came third. 
 

It's Bolt time...

ALLYSON FELIX CRUISES THROUGH HEATS
Triple gold medallist in London, Felix is making do without her beloved 200m at Rio 2016. This morning, she qualified for the semi-finals of the 400m in a time of 51.24, two seconds outside of her personal best.

The semi-finals start tomorrow at 8:45pm.

US WOMEN WIN GOLD ON THE WATER
For the first 1,000 metres, the US women's eight rowing team bided their time behind Canada and the Netherlands on the lake this morning. They came across the halfway point of the race in third, just behind the struggle for first.

But then the Americans made their move. Just after the line they passed the Dutch and then the Canadians. And then they said goodnight to the field. The USA crossed the line fully 2.49 seconds ahead of Great Britain and won their first rowing gold medal of Rio 2016. Romania came third to take bronze.

PHOTO FINISH IN THE SINGLE SCULLS
Mahe Drysdale of New Zealand and Damir Martin of Croatia were almost inseparable for the entire length of the stunning Lagoa course.

Even when they crossed the line, neither Drysdale or Martin or the fans in the stands could tell who won. The scoreboard at Lagoa Stadium showed an identical 6:41:34 time for the two rowers, sending officials rushing to the replay monitors to break the dead heat.

Minutes later, Drysdale was announced the winner, crossing the line just centimetres ahead of Martin. Hard on the Croat, but a race to remember.

​Drysdale told Rio 2016 after the race: "I had no idea. I got the feeling he just passed me and I just chucked in a few short ones in desperation. It was not the way you want to finish, but to come away with that result was fantastic."

(Photo: Getty Images/Christian Petersen)

USA STILL SITTING PRETTY AT THE TOP OF THE MEDALS TABLE
Dominance in the pool has helped team USA pull away from China on the medals table, while Great Britain has risen a few places after some impressive performances at the velodrome. 

Today, there are three events taking place in which the USA has never won a medal; table tennis, badminton, and trampoline gymnastics. So tune in to those if you would like some more variety in your gold medal winners.
 

CONGOLESE REFUGEE POPOLE MISENGA'S RIO 2016 EXPERIENCE​
At his first Olympic Games and competing under the Team Refugees flag, 25-year-old Popole Misenga did not expect to receive the reception he got from the home crowd.

Misenga won his first fight and lost his second, but history was already made.
 

A HISTORIC HOLE-IN-ONE
South Africa's Jaco Van Zyl made history during his round on Saturday morning at the Rio 2016 golf course.
 

He sunk a hole-in-one on the eighth hole of the round, and it is just the second hole-in-one in the history of golf at the Olympic Games, after Justin Rose's ace on Thursday. Van Zyl is currently T39 on the tournament. 

RICKIE FOWLER IS MAKING HIS MOVE IN GOLF
After entering Saturday's third round 14 shots back of Australian Marcus Fraser, American Rickie Fowler needed a big day to stay in contention for a medal.
 

He's done just that so far.
 

Fowler birdied seven of the first 10 holes of the round and currently sits in a tie for 15th, 35 positions from where he started the day. He's now just seven strokes behind Fraser, who has yet to start his round.