Serena, Nadal and Thiem advance to U.S. Open quarter-finals

Williams beat Sharapova in straight sets, 6-1, 6-1..It was Williams' first U.S. Open match since losing to Naomi Osaka in last year's final..Williams now leads the head-to-head series with Sharapova 20-2..Every time I come up against her, I just bring out some of my best tennis., Serena Williams, via statement.

What Sunday Dare said about Nigeria's sport sector

The 37-year-old tennis player wanted to keep her 2-year-old daughter, Olympia, inside her belly. She had researched so much about the birthing process and it scared her.

Playing together: Promoting education and social inclusion through sport

Masai Ujiri, General Manager of Toronto Raptors, a professional Canadian Basketball team, joined CNBC Africa’s Kenneth Igbomor at the Africa Investment Forum to talk about developing the game on the continent and the investment opportunities that the Forum offers.

Serena Williams' "heroes" are mothers, as she can't believe the amount of work that goes into raising a child.

In the remote Indian state of Manipur, polo dates back centuries - it was there that it came to the attention of British colonialists who formalised the sport as polo, and spread it around the world. Now a group of women players are challenging the rural region's traditions in the so-called 'sport of kings'.

Longboard dancing may still be relatively underground, but scroll through your Instagram feed and you're likely to spot a video many like Lotfi Lamaali or Cassandre Lemoine performing acrobatics on their skateboards.

Serena Williams trains in Melbourne as officials announce that up to 30,000 spectators will be allowed to attend the Australian Open per day. About two weeks ago, the top stars are seen arriving in Adelaide ahead of flying to Melbourne to compete in the Australian Open.

The captivating traditional wrestling championship in Niger is an annual event. The west African nation's "king sport" is about much more than just a good fight.

He may not be headed to Tokyo this summer, but French B-Boy Mounir is gearing up for the 2024 Paris Games, where breakdancing will make its debut. It's a welcome announcement, one that will "put the spotlight on the sport to open it to a wider audience" and "make it easier to get grants". "I think it's a great thing for breakdancing," Mounir explains. But for him, breakdancing is much more than just a sport. "It's become such an integral part of our culture... it's a lifestyle."

Allyson Felix says she is proud of fellow sports stars speaking out on mental health issues, although more has to be done to support athletes including those with young children. Felix was speaking shortly before being confirmed as Sportswoman of the Year at the Annual Salute to Women awards in New York. Tennis player Naomi Osaka, who spoke about her mental health problems earlier this year, was given the Wilma Rudolph Courage Award. Felix, 35, is now the most decorated female track and field athlete of all time at the Olympics, and no American has won more than her 11 medals, which included a gold and a bronze in Tokyo.