Retiring legend Serena Williams has indicated she "will always have some sort of involvement" in tennis as she prepares for the US Open, in what will be the final Grand Slam of her career.

The 40-year-old has won 23 major singles titles, while also adding 14 doubles championships in a brilliant career, but will be hanging up her racquet after she plays in the tournament she has won six times.

Her first time lifting the US Open trophy came in 1999, but even after spending over two decades at the top level of the sport, Williams says she will continue to be active in tennis.

"I will never retire from something I absolutely love," the American told Meghan Markle on the Duchess' new Spotify podcast.

"I will always have some sort of involvement in it. Maybe not professionally, but I will always want to be involved in some form in tennis. Obviously, I’ve retired professionally, but it’s also an evolution."

Williams also outlined her plans for the future, adding: "I really want to expand my family, and you know I’ve been putting it off for so long.

"As a woman, there’s only so long you can put that off and other people out there, other men out there, can continue to play. My best is being a mom; I think I can do really good at that."

Fellow tennis legend John McEnroe has heaped praise on Williams ahead of the tournament at Flushing Meadows, commenting: "The way that she moves the needle when she plays, it's like Tiger Woods and golf.

"You can look at the accomplishments, she has the Grand Slam victories. Off the court, I know that she's had a lot of difficulties in her life that she talks about in her own documentaries, but she has come out the other end as this icon, global superstar.

"Her story alone, what she represents as someone who's an African-American girl who came from a tough situation, and became the greatest player that ever lived. What that represents for us, and maybe around the world, is an opportunity that it can happen to anyone potentially."

Former Australian Open champion Sofia Kenin claimed her first victory since January at Tennis in the Land on Monday.

Kenin, who has struggled mightily with illness and injury since her triumph in Melbourne in 2020, has seen her ranking drop to 415 in the world.

She had lost her last nine matches but was back to winning ways in Cleveland, where Kenin earned a 6-4 6-3 win over qualifier Dalayna Hewitt in an all-American clash.

Bernarda Pera and Madison Brengle gave the home fans plenty to cheer about with first-round victories, while Lauren Davis came up short in three sets against third seed Ekaterina Alexandrova.

Seeds Martina Trevisan, Aliaksandra Sasnovich and Alize Cornet all sealed wins, the latter thrashing Dayana Yastremska for the loss of just three games.

At the Granby Championships, top seed Daria Kasatkina had to come from a set down to beat Greet Minnen 6-7 (4-7) 6-4 6-2 in just under three hours.

Seventh seed Kaja Juvan lost to 17-year-old Cadence Brace but seeds Jasmine Paolini, Anna Bondar, Nuria Parrizas Diaz, Tereza Martincova and Marta Kostyuk all emerged victorious.

Petra Kvitova fended off home favourite Madison Keys to reach the Western and Southern Open final and secure a return to the world's top 20.

The two-time Wimbledon champion battled to a 6-7 (6-8) 6-4 6-3 victory in two hours and 18 minutes, saying the match had been "mentally so tough".

Both players had taken significant scalps to reach this stage, with Keys knocking out world number one Iga Swiatek and Kvitova ousting Wimbledon runner-up Ons Jabeur.

Kvitova reached semi-finals at Cincinnati in 2012 and 2018 and lost three-set battles on both occasions, but this time she came good in the decider to earn a first final appearance at the event and a 40th overall in her WTA career.

The 32-year-old Czech slipped an early break adrift in the opening set before fighting back to force a tie-break. She came from behind in that, too, to level up at 6-6, only for hard-hitting American Keys to win the next two points, the first with a sizzling backhand winner.

Kvitova sensed she was still firmly in the match, however, and surges to 3-1 in each of the next two sets provided the platform to fully turn around the contest.

A 12th WTA 1000-level final awaits her, and she will go to 20th in the rankings should she lose Sunday's final and up to 15th if she carries off the title.

Kvitova said of her win: "It was incredibly tough. I expected it would be tough, but I didn't expect it that tough. Madison played unbelievable.

"She played an amazing tie-break, but I tried to keep going, be there and be a little calmer than before and wait for the chances. It was an incredible match, and I'm really happy that I made it somehow.

"I don't really care about the ranking. Being in the final, that's more important, and that's why I'm playing tennis: to be in finals and fighting for a trophy."

She awaited the winner of the second semi-final between Aryna Sabalenka and Caroline Garcia.

Madison Keys stunned top seed Iga Swiatek 6-3 6-4 to book her place in the quarter-finals of the Western & Southern Open on Thursday.

Keys arrived in the contest seeking a first career victory over a reigning world number one in six attempts, having failed to win a set in each of the previous five.

The 2019 champion had also lost her previous two showdowns with Swiatek, including a resounding 6-1 6-0 defeat in the Indian Wells Open quarter-finals earlier this year.

After the first games went with serve, Keys went into overdrive; reeling off nine successive games to take full command of the contest at 6-3 5-0.

Swiatek rallied as she rescued match point to avoid the bagel, winning 11 of 12 points to reduce the second-set deficit to 5-3.

The winner of six WTA titles this season, the Pole saved a further match point in the ninth game before claiming what appeared to be another crucial break of serve.

However, former US Open finalist Keys responded magnificently to make it third time lucky against Swiatek, who is now 4-4 since her 37-match winning streak ended with defeat by Alize Cornet at Wimbledon.

The prize pot for this year's US Open will top $60million for the first time in the competition's history, event organisers have announced.

The 2022 edition at Flushing Meadows gets under way on August 29 and runs for just under two weeks.

It was revealed on Thursday that $60m will be up for grabs, topping the previous record of $57.5m from last year, with both singles champions to receive $2.6m.

Players will be given $80,000 for making the main draw and $121,000 should they make it to the second round. Runners-up in the singles will pocket $1.3m.

In the doubles, the champions will receive $688,000, the runners-up $344,000 and the semi-finalists $172,000.

Emma Raducanu admitted she has been "too tense" in recent defeats and is aiming to play more freely as she prepares to defend her US Open title.

Raducanu has struggled to follow up last year's shock win at Flushing Meadow, but she appears to have hit form at just the right time.

The 19-year-old has beaten both Serena Williams and Victoria Azarenka in straight sets during this week's Western and Southern Open in Cincinnati, dropping just four games against Williams and two against Azarenka.

Her win against Azarenka on Wednesday was just Raducanu's third career victory against a top-25 opponent, after beating Belinda Bencic and Maria Sakkari on her way to winning last year's US Open.

Speaking after her win against the Belarusian, Raducanu said: "I think I have tried a lot of things, and this year I think some matches, I have lost a lot of matches from leading situations and probably just played too tense.

"I think that I just need to swing, and I just said that these two tournaments, or this tournament especially, I'm just going to swing freely and take that and see what happens."

Raducanu also said she will wait until after the tournament to reflect on beating two multiple grand slam champions with relative ease.

"I think after the tournament I actually have to take a step back and be like, 'Look, you just beat two unbelievable champions'," she said. "It's a pretty good achievement. You know how difficult the wins are to come by."

The number 10 seed will face seventh seed Jessica Pegula in the third round in Cincinnati on Thursday.