Madison Keys is intent on giving Maria Sakkari a second-round test after marking her first WTA Tour appearance since September with a clinical win at the Qatar Open.

American world number 19 Keys, who reached the US Open final in 2017, had not played on tour since losing to Zhang Shuai in the first round of the French Open in late September – she was ruled out of the Australian swing of this season after a positive coronavirus test.

But Keys roared back to action with a thumping 6-4 6-1 victory over Belinda Bencic on Tuesday, the Swiss who last week reached the Adelaide International final.

"I'm really happy with how I came out and played today," Keys said. "I'm a little bit surprised with myself but hoping to keep the momentum going."

Sakkari promises to pose a tricky test for Keys, who is unseeded this week, given the Greek player dropped only three games in her opening win over Mayar Sherif and has shown bright early-season form.

World number 23 Elena Rybakina tripped up in the first round after the Moscow-born Kazakh player lost 7-6 (9-7) 7-6 (7-5) to Germany's 56th-ranked Laura Siegemund at the WTA Premier event.

Jessie Pegula, Anastasia Pavlyuchenkova, Ons Jabeur and Misaki Doi also scored straight-sets victories in Doha.

At the Lyon Open, French players Caroline Garcia and Kristina Mladenovic were both pushed to three sets before inking their places in the last 16.

Third seed Garcia edged compatriot Oceane Dodin 6-2 2-6 6-3, while fourth seed Mladenovic scrambled for a 5-7 7-5 6-2 win over Romanian Mihaela Buzarnescu.

Former Wimbledon runner-up Eugenie Bouchard, in on a wildcard, was bounced out 7-6 (9-7) 6-2 by Aliaksandra Sasnovich, the world number 96 from Belarus.

Toto Wolff admitted Max Verstappen is a driver who will be "on everybody's radar" but has vowed Mercedes will not rush to seduce the Red Bull star.

Mercedes team principal Wolff will be aware that reports have linked Verstappen with a possible future move to the Silver Arrows, possibly as a long-term replacement for Formula One champion Lewis Hamilton.

For now, though, Hamilton is going nowhere, having signed a contract for the upcoming 2021 season, and the British driver may yet remain for years to come.

After landing a seventh drivers' title last year to match Michael Schumacher's F1 record, there is no driver that Mercedes would take above Hamilton in the present time.

Wolff said: "The symbiosis that we have in the relationship, it's always that we have a mutual understanding of what we want to do in the future. That will be also the case in the discussions with Lewis going forward.

"Max is certainly an outstanding young driver that will be on everybody's radar in the future, but we are not flirting outside before we have a clear understanding with our two drivers."

Verstappen has finished third in the championship in each of the last two seasons, with the 23-year-old winning races at Silverstone and Abu Dhabi during the 2020 campaign.

He tallied 214 points to finish just nine points behind Mercedes' runner-up Valtteri Bottas in the championship.

Quoted widely after Mercedes unveiled their new W12 car on Tuesday, Wolff underlined how Mercedes are not blinkered about the team's future and the potential for a change of direction.

Bottas is also due to reach the end of his contract after the new campaign, meaning Mercedes currently have flexibility should they wish to reshape their driver line-up for 2022 and beyond.

"Our first discussions are going to be with Valtteri and Lewis in respecting our values, integrity and loyalty - but on the other side the young drivers are the future," Wolff said.

"Therefore we need to consider how we want to set ourselves up for the years beyond."

World Rugby has declared this year's Rugby World Cup in New Zealand should be postponed to 2022, dealing a major blow to the women's game.

Citing "uncertain and challenging" conditions caused by the coronavirus pandemic, World Rugby said it would not be possible to suitably stage an event of such scale.

Its recommendation will be put to the Rugby World Cup board and World Rugby's executive committee on March 8 and 9 but seems certain to be passed.

In a statement, the governing body said: "World Rugby has made the difficult decision to recommend the postponement of Rugby World Cup 2021, scheduled to be hosted in New Zealand from September 18 to October 16, until next year.

"While appreciating the recommendation is extremely disappointing for teams and fans, it has their interests at heart, and gives the tournament the best opportunity to be all it can be for them, all New Zealanders and the global rugby family."

It is clear World Rugby has made the recommendation to stave off the possibility of the tournament going ahead in difficult, sterile conditions.

New Zealand as a nation has achieved low instances of COVID-19, in a large part because of strict border controls.

World Rugby said: "It has become clear in recent discussions with key partners including New Zealand Rugby, the New Zealand government and participating unions, that, given the scale of the event and the COVID-19-related uncertainties, it is just not possible to deliver the environment for all teams to be the best that they can be on the sport’s greatest stage.

"The challenges include uncertainty and the ability for teams to prepare adequately for a Rugby World Cup tournament both before and on arrival in New Zealand, and challenging global travel restrictions."

Ireland hosted the last Rugby World Cup for women in 2017, with New Zealand beating England in the final, giving the Black Ferns a fifth victory in the last six editions of the tournament.

Lewis Hamilton says his decision to only sign a one-year contract with Mercedes should not cause concern as he prioritises his drive for more diversity in Formula One.

It took until February before seven-time world champion Hamilton and Mercedes finally announced they had come to terms on a new contract.

The agreement was only for 2021, the last season before sweeping regulation changes come into the sport.

Hamilton, 36, insists there should be no doubts over his commitment.

The Briton also spoke of his passion to fight for change and equality in F1 and wider society.

That will serve as his main focus in a year where he could surpass Michael Schumacher outright with an eighth title.

"I'm kind of in a fortunate position where I've achieved most of the stuff I wanted to achieve up until this point, so there's no real need necessarily to plan too far ahead in the future," Hamilton said at the launch of Mercedes' new W12 car.

"I'm fully invested in this season and delivering. I still love what I do.

"We're living through an unusual period of time in life and I just wanted one year. Then we can talk about if we do more, and keep adding it [by] one if we have to.

"I chose to have a one-year deal, so I can see where we are at. It doesn't mean I'm not committed.

"What I'm really focused on - there was a lot of discussion around the diversity issue, what is important is that we are delivering."

Hamilton added: "I'm really proud of my team, I'm already seeing steps to see that progress. That's my driving force to make sure we continue to push for accountability.

"The main priority for 2021 - in the past it was about just winning championships. But now it's really pushing for making real change.

"Last year there was discussion about equality and inclusion and there was a lot of talk this year about pushing for diversity and really making sure that action is taken.

"That's at the core of the drive for me, but of course we exist to win. That is what all these guys and girls here are working towards, so that's my goal to deliver it for them."

Mercedes boss Toto Wolff echoed the comments of Hamilton and is not concerned about the short deal.

Wolff said: "No doubt about his commitment. First of all, he enjoys racing a lot. We enjoy working with each other and we discussed that a lot.

"But he’s absolutely right. The times change, new priorities for all of us in terms of the way we live, our health, he is very passionate about his initiatives against racism and inequality.

"Then we have this massive regulatory change in 2022 that is going to reshape what Formula One will be.

"I don't think this will play a role, but I think it's fair for a driver who has won seven championships to have the flexibility to decide what he wants to do in future.

"We have agreed that we want to pick up the discussions much earlier this year to avoid a situation like we had in 2020, to run out of time and be in the uncomfortable position that we have no time left before the beginning of the season."

The 2021 season is scheduled to get under way with the Bahrain Grand Prix on March 28.

Johnny Sexton will continue to strut his stuff for Ireland and Leinster after signing a one-year contract extension to the end of the 2021-22 season.

The 35-year-old laid to rest speculation over his immediate future as he agreed a longer deal with the Irish Rugby Football Union (IRFU) on Tuesday.

Sexton, the 2018 World Player of the Year, is Ireland's captain and talisman, with the fly-half in no rush to hang up his boots. 

"I am really enjoying my rugby and I want to keep learning and adding value to both the Ireland and Leinster environments," he said. 

"I am enjoying the challenge of captaincy and the added responsibility that it brings. My appetite for success is the same as it ever was and the ambitions of both the Ireland and Leinster squads match my own."

Sexton's impressive list of honours includes three Six Nations titles with his country, for whom he was won 97 caps, and four European Cups with Leinster. 

Ireland's 2021 Six Nations campaign started with back-to-back loss against Wales and France before Saturday's thrashing of Italy.

Reigning Tour de France champion Tadej Pogacar has signed a contract extension to stay at UAE Team Emirates until 2026.

The 22-year-old, then 21, became the youngest Tour winner in 116 years with a thrilling triumph in September, overhauling fellow Slovenian Primoz Roglic in the individual time trial in the penultimate day of the race.

And Pogacar will continue to ride for UAE Team Emirates after committing his future to the outfit.

The deal was announced after Pogacar claimed his first victory of the season at the UAE Tour.

"I feel at home in this team – there is a special atmosphere between the management, riders and staff and it's a good environment to be in," he said.

"The team shows a lot of trust and confidence in me, which I am thankful for, and I work hard to show that when I'm racing alongside my team-mates.

"I hope we can have many more successful seasons together in the years ahead."

Reigning Tour de France champion Tadej Pogacar has signed a contract extension to stay at UAE Team Emirates until 2026.

The 22-year-old, then 21, became the youngest Tour winner in 116 years with a thrilling triumph in September, overhauling fellow Slovenian Primoz Roglic in the individual time trial in the penultimate day of the race.

And Pogacar will continue to ride for UAE Team Emirates after committing his future to the outfit.

The deal was announced after Pogacar claimed his first victory of the season at the UAE Tour.

"I feel at home in this team – there is a special atmosphere between the management, riders and staff and it's a good environment to be in," he said.

"The team shows a lot of trust and confidence in me, which I am thankful for, and I work hard to show that when I'm racing alongside my team-mates.

"I hope we can have many more successful seasons together in the years ahead."

Joel Embiid felt he "dominated" Myles Turner once more as he boosted his Defensive Player of the Year hopes in the Philadelphia 76ers' win against the Indiana Pacers.

Embiid posted 24 points, five assists and 13 rebounds – all on the defensive end – as the Sixers raced to a 130-114 victory, improving to 23-12 at the top of the East.

It was a fourth defeat in a row for the Pacers and a punishing night for center Turner, who had promised to "step up to the challenge" of taking on MVP contender Embiid.

Turner is now 4-7 against Embiid in their career regular-season matchups, only once surpassing 11 points – his contribution on Monday – across those 11 games (25 points in March 2018).

By contrast, Embiid has averaged 28 points against the Pacers and enjoyed two of his 12 career 40-point games in meetings with Turner.

"He's a great player and I have a lot of respect for him," Embiid said of Turner, who joined the NBA the year before him.

"I say this respectfully: that's a matchup that I have dominated since I got to the league."

While Embiid looks to be going toe-to-toe with LeBron James for the MVP award, he says a DPOY challenge is also on the cards.

Rudy Gobert is widely considered the leading candidate for the outstanding Utah Jazz, topping the charts for defensive rebounds with 9.9 per game, Turner has been mooted as an alternative.

He has a sublime 3.4 blocks per game – well clear of second-placed Gobert's 2.8 – but could not live with Embiid, who averages 9.2 defensive rebounds, 1.3 blocks and 1.2 steals.

"[Turner] is a great defender," Embiid said. "He leads the league in blocks, he should be up there for Defensive Player of the Year, and that's also one of my goals.

"In those types of matchups, that's where you've got to take advantage. Especially if I have my eyes set on being the Defensive Player of the Year."

James Harden produced a triple-double as the Brooklyn Nets survived in overtime to claim a 124-113 win over the San Antonio Spurs on the road.

The Nets led by 10 points late in the game, but the Spurs forced overtime after the returning Kyrie Irving missed a lay-up and guard Dejounte Murray scored after falling to his knees on the transition.

But Brooklyn steadied the ship in overtime, with Harden finishing with 30 points, 14 rebounds and 15 assists, with good support from Irving (27 points) and Bruce Brown Jr. (23 points).

Zion Williamson scored 15 of his 26 points for the game in the third quarter as the New Orleans Pelicans toppled Western Conference leaders Utah Jazz 129-124.

The former number one pick's third quarter output was the second best of his career to date.

Doncic delights, Jokic goes big

Luka Doncic was one assist shy of a triple-double as he led the Dallas Mavericks to a 130-124 victory over the Orlando Magic, who have lost four in a row.

The in-form Slovenian All-Star finished with 33 points, 10 rebounds and nine assists for the Mavs, while Nikola Vucevic did his best for Orlando, with 29 points, 15 boards and eight assists.

Bojan Bogdanovic (31 points) was nailing three-pointers for fun for the Jazz, but the Pelicans' third quarter was the difference, piling on 40 points to 24.

Big Serbian Nikola Jokic posted 39 points, 14 rebounds and nine assists as the Denver Nuggets beat the Chicago Bulls for the eighth straight time 118-112.

Joel Embiid put up 24 points as the Philadelphia 76ers got past the Indians Pacers 130-114.

No launch for Rockets

The Houston Rockets suffered their 12th consecutive defeat, going down 101-90 to the Cleveland Cavaliers.

The result leaves the Rockets heading towards the foot of the table with a 11-22 record, including nine defeats at home.

Downtown Trail Blazers

Carmelo Anthony posted a season-high 29 points which included six three-pointers in the Portland Trail Blazers' 123-111 win over the Charlotte Hornets.

Anthony's six three-pointers helped the Trail Blazers set a new franchise record for most in one game, finishing with 24.

Monday's results

Philadelphia 76ers 130-114 Indiana Pacers
Dallas Mavericks 130-124 Orlando Magic
Denver Nuggets 118-112 Chicago Bulls
New Orleans Pelicans 129-124 Utah Jazz
Brooklyn Nets 124-113 San Antonio Spurs (OT)
Cleveland Cavaliers 101-90 Houston Rockets
Portland Trail Blazers 123-111 Charlotte Hornets

Playoffs contenders face off

There are three clashes between top contenders on Tuesday, led by the Los Angeles Lakers (24-11) and Phoenix Suns (22-11) meeting, along with the San Antonio Spurs-New York Knicks and Boston Celtics-Los Angeles Clippers clashes.

Zion Williamson's 15-point third quarter in Monday's shock win over the Utah Jazz was "incredible" according to New Orleans Pelicans head coach Stan Van Gundy, who again called on the referees to give him more protection.

The former number one draft pick was integral to the Pelicans' 129-124 victory over the Western Conference leaders, finishing with a double-double of 26 points and 10 rebounds to go with five assists.

Utah pulled to within one point with 45 seconds to go before Williamson was ice cool with two free-throws.

The Pelicans got the jump in the third, when they outscored Utah 40-24 and opened up an 11-point buffer at the last change, led by Williamson with his second most prolific quarter in his NBA career to date.

"The third quarter was incredible," Van Gundy told reporters about 20-year-old Williamson post-game.

"They did a much better job on him in the fourth. In the third quarter he was overwhelming."

The Pelicans improved to a 15-19 record with the win to stay in the playoffs hunt and Williamson said it was all about their "want".

"We've found ourselves in situations like this all the time," Williamson told Fox post-game after trailing by five at half-time.

"It's a matter of want. Tonight we wanted it more. We came out with better energy in the third and got the win."

Meanwhile, Van Gundy once again lamented the lack of calls that Williamson was receiving from the officials, having made the same point after their loss to the Milwaukee Bucks recently.

"Some day he's going to start to get the calls he deserves to get," the Pelicans coach said.

"Any game he's not shooting 10 free-throws or more, I'm guaranteeing they're missing some calls."

Three-time grand slam winner Andy Murray revealed he deleted his social media apps after being inspired by The Social Dilemma documentary, rather than constant abuse he receives about retiring.

The 33-year-old claimed his first ATP Tour victory in six months on Monday, winning 2-6 7-6 (7-2) 6-3 over fellow wildcard Robin Haase in just under two and a half hours at the Rotterdam Open.

The past few years for Murray, who missed last month's Australian Open after testing positive to COVID-19, have seen him battle hip issues, before getting a metal cap inserted to strengthen the area.

Since then, the Scot been unable to reach the levels that previously saw him win major titles and be world number one, leading to constant calls for him to retire, particularly on social media.

"Actually, I deleted it, I don't have Twitter on my phone and I deleted Instagram last week, not because of that [the retirement comments]," Murray said.

"You see those things on Instagram and social media if you're on it, obviously and if you have the app on your phone but I'd watched a while ago that Social Dilemma movie.

"I thought it was brilliant and then actually, a couple of days after my match last week I watched an interview with all the people that were responsible for making that and I was like, 'Yeah, I’m done'. I deleted that off my phone but yes, it's tough."

Murray admitted his return from his injury battles had been physically taxing, while the mental toll had not been easy to handle either.

However, he felt he performed well enough to offer him no genuine reason to want to retire from the Tour.

"Since I came back and started playing with the metal hip, I’ve beaten some pretty good players," he said.

"I beat Stan [Wawrinka], I beat [Matteo] Berrettini, I beat [Alex] Zverev. I served for the match against [Fabio] Fognini. These are top players that I was playing against and competing well against and physically now I'm in a better place than I was then.

"I've put in a lot of good physical work since then so why should I stop because I lost a match last week against someone [Egor Gerasimov] that people would expect me to win against.

"Everyone out there can play and because I'm not on the top of my game just now, and once I get there I believe I'll win matches more competitively.

"Why should I stop? Tell me a good reason for why I should stop playing. I can still compete with the best players in the world with one hip. I think that's quite amusing really."

All Blacks half-back Aaron Smith has committed to New Zealand Rugby (NZR) until the 2023 World Cup in France after signing a new contract.

NZR confirmed on Tuesday that the 32-year-old, who has 97 caps for the All Blacks, had penned a new deal securing his future with Super Rugby side Highlanders and provincially with Manawatu.

Palmerston North-born Smith is New Zealand's most capped half-back and remains a key member of the All Blacks side who finished third at the 2019 World Cup.

"One thing that hasn't changed is my love for the Highlanders, the All Blacks and Manawatu," Smith said.

"The decision to stay is based on a number of things, but I'm very keen to see the Highlanders do well, we have a good environment here and some great, young players, so I think the next few years will be exciting for us and it'll be great to be part of it.

"Dunedin has been good to me. My wife Teagan and I have a home and a business here and our son Luka was born here. 

"I felt that committing to the Highlanders for another few years in some small way says thanks for all the support we have enjoyed over the years."

All Blacks coach Ian Foster added that Smith's influence on the side could not be underestimated.

"He is so instrumental in the way we play the game and is such a vital cog for us, both on and off the field, so this is fantastic news," Foster said. 

"We're delighted that Aaron, Teagan and his family have decided to commit to New Zealand and congratulate them on the decision."

It is anticipated Smith will bring up his 100th New Zealand cap this year, while he is two caps away from equalling the record for most appearances for the Highlanders.