Chris Evert has backed her long-time rival and friend Martina Navratilova to win her latest cancer battle.

American tennis great Evert, who completed her own course of chemotherapy treatment in May after being diagnosed with ovarian cancer, said Navratilova's "strength and resilience" would stand her in good stead.

Navratilova has been diagnosed with throat and breast cancer, she announced on Monday. The Czech-American successfully underwent treatment for breast cancer in 2010 and has said the condition is "serious but still fixable" this time.

Evert's battles with Navratilova in the 1970s and 1980s provided one of the all-time great tennis rivalries.

Both women ended their careers with 18 grand slam singles titles, with Navratilova triumphing a record nine times at Wimbledon. Only Steffi Graf (22) and Serena Williams (23) have won more singles majors among women in the Open Era.

Evert posted on Twitter: "Thinking of @Martina today and supporting her journey, like she did mine, with love and prayers. This is a woman who takes on challenges with strength and resilience…You got this, Martina."

Former US Open champion Tracy Austin sent "prayers and hugs", adding: "Don’t know too many stronger, I know you got this my friend."

Navratilova's long-time former doubles partner Pam Shriver added: "@Martina knows how to put together a winning team. While the news today is difficult, Martina understands how to compete, and take care of herself.

"Her loving family and many friends are ready to support her journey one day at a time. You have this partner!"

Ons Jabeur, who was runner-up at Wimbledon and the US Open last season, said she was "sending my love and my support".

Siya Kolisi will be staying in France after the Rugby World Cup, with the South Africa captain clinching a move from the Sharks to Racing 92.

The Springboks' first black skipper, who led his team to 2019 global glory in Japan, will be targeting a repeat when France stages the 2023 World Cup in September and October.

It has now emerged Kolisi has agreed a long-term deal to switch to the Top 14, signing up until 2026 with Paris-based Racing in a deal that will take effect after the World Cup.

The 31-year-old flanker said: "I am very enthusiastic about the idea of ​​joining Racing 92 after the 2023 Rugby World Cup, a visionary club that I have always admired.

"I would like to thank all those involved in Racing 92 and the Cell C Sharks for allowing me to take up this new challenge. Racing 92 have great ambitions on the pitch but also very encouraging societal projects, which corresponds to my personal values ​​and mission."

In a statement announcing the signing, Racing said they would also collaborate with the Sharks in the long term on an exchange of ideas in a "broader long-term" agreement between the teams.

Racing chairman Jacky Lorenzetti said of Kolisi: "His deep culture of victory and his natural leadership make him a very great player who doubles as a deeply humanist man. He will bring additional positive energy to Racing 92."

Sharks CEO Eduard Coetzee said Kolisi had been "an instrumental and much-loved member" of the club since joining from the Stormers in February 2021.

"His well-documented and commendable leadership qualities extends far beyond the playing field," Coetzee said on the Sharks website. "His move to France is a new and exciting opportunity and we could not be happier for him."

Damar Hamlin had the American sporting community rooting for him after the Buffalo Bills safety suffered an on-field cardiac arrest, as team-mate Josh Allen pleaded: "Please pray for our brother."

Hamlin was in a critical condition at the University of Cincinnati Medical Center, having collapsed during Monday's game against the Cincinnati Bengals.

Hamlin made a tackle on Bengals receiver Tee Higgins in the first quarter, and after briefly returning to his feet, he slumped to the ground.

He was administered CPR on the field, before being loaded into a waiting ambulance and rushed away.

Amid harrowing scenes, the game was suspended while the Bengals were leading 7-3 with 5:58 remaining in the first period.

Allen led the call for prayer for Hamlin, with well-wishers from across sport, entertainment and politics also sending thoughts and best wishes.

Former Chargers and Saints quarterback Drew Brees wrote on Twitter: "Damar Hamlin represents every one of us and every team-mate we've ever had.

"I've never met him, but I know him as a member of our brotherhood. My family and I pray for him and his family as he recovers. God be with him."

Michael Vick and Patrick Mahomes also said they were praying for Hamlin, the latter adding: "Please be okay man."

Tennessee Titans quarterback Ryan Tannehill added: "Praying for Damar Hamlin, his family and everyone in Buffalo... no words for a situation like this."

The NFL said: "Our thoughts and prayers are with Damar, his family and the Buffalo Bills."

Arizona Cardinals defensive end J.J. Watt said: "The game is not important. Damar Hamlin’s life is important. Please be ok. Please."

From basketball, the NBA said: "The entire NBA family's thoughts and prayers are with Damar Hamlin, his family and the NFL community."

That was reflected in post-game comments from a number of leading stars after Monday's NBA action, with Lakers superstar LeBron James saying: "My thoughts and super prayers goes up to the skies above for that kid's family, for him, for that brotherhood of the NFL and everybody a part of the NFL family."

James said it was "definitely the right call" to abandon the game for the night.

He said of the incident: "It was a terrible thing to see and I wish nothing but the best for that kid, for the city of Buffalo, for the franchise of the Bills and like I said, for the rest of the NFL as well and also the Bengals that was there and playing in that game."

Klay Thompson, from the Golden State Warriors, added: "As athletes, sometimes the game can overshadow us as individuals or people.

"On behalf of the organisation, we wish him the best. We're keeping him in our prayers and hoping for the best possible outcome. He's a tremendous person and it's bigger than the sport."

Hollywood actor Ben Stiller, a big sports fan, wrote: "Sending good thoughts and prayers to Damar Hamlin and his family."

Former New York City mayor Rudy Giuliani said: "Our prayers are with Damar Hamlin."

Amid the focus on Hamlin's plight, there was a surge in donations to a Christmas fundraiser the Bills star organised in 2020, to raise money to buy toys for children hit hard by the pandemic.

The fundraiser's target had been $2,500, but its running tally passed $3million by the early hours of Tuesday.

Klay Thompson recalled his lowest moments from an extended time on the sidelines after posting his best scoring performance of the season on Monday.

Thompson, who missed over two and a half years through injury before returning to the court last January, scored 54 points as the Golden State Warriors sealed an overtime win against the Atlanta Hawks.

The 32-year-old, who also had eight rebounds and three assists, made 21 of 39 field goal attempts and 10 of 21 from beyond the arc as the Warriors won 143-141 at Chase Center.

"It's better than good, [it's] amazing,'' Thompson said after his performance. "Those moments where you have the ball with the game on the line down the stretch and your team-mates trust you, those are what you really live for as a competitor, as a basketball player. It was hard to see those at times during the rehab process."

The defending NBA champions have struggled on the road this season, but their far more reliable home form saw them move to 20-18, with 17 of those wins coming at Chase Center.

Coach Steve Kerr was particularly pleased with the effort of Thompson, saying: "He just made shot after shot and play after play, he was incredible."

Kevon Looney scored the winning basket right at the final buzzer in second overtime, making up for a miss just prior, and laughed when asked if he had ever scored a game-winner before.

"Not a walkoff game-winner," Looney said. "I rushed the first one. I didn't think I had that much time, but I saw I had more time, so I took my time on the second one and I was able to make it."

LeBron James' ability to take care of himself allows the Los Angeles Lakers to still rely on the 38-year-old, says coach Darvin Ham.

Having managed 47 points in Friday's win at the Atlanta Hawks, James scored 43 in the Lakers' 121-115 victory against the Charlotte Hornets, becoming the first player beyond the age of 38 to score 40 or more in consecutive games since Michael Jordan.

James, who also recorded 11 rebounds and six assists at Spectrum Center in almost 40 minutes on court, turned 38 on Friday.

"I just want to ride him," Ham said after the win. "And he allows you to do that because he takes such great care of himself. So, it's a great luxury to have."

James has been in impressive form of late, averaging 34.5 points from his last 11 games. He insisted his consistency is unrelated to carrying more pressure following the recent injury to Anthony Davis, though his form also improved last season when Davis was sidelined.

"Last year is last year," James said when it was put to him. "Obviously, I found a good groove last year. But this year is this year, as well. I feel really good in every facet of my game."

Austin Reaves, who scored 15 points with six rebounds and seven assists in just over 22 minutes of action, also paid tribute to James' conditioning.

"It's incredible," Reaves said. "To see him at his age... the stuff that he does, the way that he moves, the contact that he endures in a full game and just the way that his body has held up this whole time, it's super impressive.

"But it's a testament to what he does on a daily basis. He's always the first one in the training room, the first one taking care of his body and also getting the work in as well. So, to say the least, I'm happy to be on his team."

Donovan Mitchell said he feels "humbled" after becoming the seventh player in NBA history to eclipse 70 points in a single game after dropping 71 in the Cleveland Cavaliers' win on Monday.

The Cavaliers beat the Chicago Bulls 145-134 in overtime, with Mitchell scoring a career-high and franchise record 71 points on 22-of-34 shooting, hitting seven-of-15 from long range and 20 of his 25 free throws.

In doing so, he beat his own personal best by 14 points after he scored 57 in a playoff loss with the Utah Jazz in 2020, and it was 25 points better than his previous regular season high of 46.

He also overtook the Cavaliers' franchise record, which was previously set at 57 by both Kyrie Irving in 2015 and LeBron James in 2017.

Mitchell added 11 assists and eight rebounds to his stat line, meaning he scored or assisted on 99 of his side's 145 points – the second-most ever, trailing only the legendary 100-point game from Wilt Chamberlain back in 1962 when he was responsible for 104 points.

Adding to his heroics, he single-handedly forced overtime when he intentionally missed a free throw with three seconds remaining in regulation, before getting his own rebound and putting it back in to tie the contest.

Mitchell went on to outscore the Bulls 13-4 by himself in the extra period, putting the finishing touches on his unforgettable night.

Speaking after the game, Mitchell said he has never scored that many points at any level, except for in video games.

"Never  – except [NBA] 2K, in 2K for sure," he said. "When I first got into the league I played as the Jazz and was shooting it every time.

"I don't think I did it this efficiently in 2K, but no I never have [scored 71 at any level]. The closest I think I got was in the bubble with 57 – but that was in a loss, so this feels a lot better."

When asked how it feels to join Chamberlain, Kobe Bryant, Elgin Baylor, David Robinson, David Thompson and Devin Booker as the only players to reach the 70-point mark, Mitchell was initially lost for words.

"It's humbling," he said. "I'm speechless, to be honest with you. 

"For me, not only did I do that, but I did it in an effort when we came back and won – and it was how we won. That's really what, for me, was like 'man, this is nuts'. 

"I'm extremely blessed, I'm humbled that I'm in that company, in that group. I've always believed I can be one of the best players in this league, but I've got to keep working. 

"This is a big milestone, but at the end of the day those guys have all won at the highest level, and that's my ultimate goal, but to be there in the record books with them is truly incredible."

Team-mate Kevin Love was in Cleveland for their tremendous run of four consecutive trips to the NBA Finals with James and Irving, but he declared this as the best performance he has ever witnessed in person.

"In my 15 years, that's the best performance I've ever seen, ever been a part of," he said. 

"I've seen some special ones, I was talking about Kyrie here against Portland when he had 55, LeBron in Game 1 of the 2018 Finals, 57 for Kyrie in San Antonio – but this one takes the cake."

Head coach J.B. Bickerstaff echoed that admiration for Mitchell's display.

"We were treated tonight to one of the greatest performances in the history of the game," he said. "Every single play that he made was a play that was necessary.

"Donovan has never put himself above the team, so how can you not root for a guy like that? I told everyone else to get out of the way."

The win improves the Cavaliers' record to 24-14 to occupy the fourth seed in the Eastern Conference, while they boast the fourth-best home record in the league at 17-4.

Donovan Mitchell shattered the Cleveland Cavaliers' franchise record with 71 points in his side's 145-134 home victory against the Chicago Bulls on Monday.

The Cavaliers' previous record for most points in one game belongs to Kyrie Irving and LeBron James, who both had a 57-point game in a Cleveland uniform in 2015 and 2017 respectively.

Mitchell also came through in a pivotal moment late in the fourth quarter to force overtime after being fouled with three seconds remaining, trailing by three. He made the first free throw, before missing the second and getting his own offensive rebound and putting it back in to tie the game.

He went on to outscore the Bulls 13-4 by himself in the extra period, finishing 22-of-34 from the field, seven-of-15 from deep and 20-of-25 from the free throw line while adding 11 assists and eight rebounds.

Mitchell blew his own career-highs out of the water, having never previously scored more than 46 points in a regular season game, although he had games of 57 and 51 in the Utah Jazz's 2020 playoff series against the Denver Nuggets.

He scored or assisted on 99 of the Cavaliers' 145 points – the second most all-time, trailing only Wilt Chamberlain's 100-point performance in 1962 where he contributed to 104 points.

Mitchell joins Chamberlain, Kobe Bryant, Elgin Baylor, David Robinson, David Thompson and Devin Booker as the only players to reach the 70-point figure.

It overshadowed a terrific performance from Chicago's DeMar DeRozan, who scored a team-high 44 points on 16-of-32 shooting with four assists and four steals.

LeBron carries the Lakers in vintage display

Los Angeles Lakers superstar LeBron James willed his side to a 121-115 road win against the Charlotte Hornets with his second consecutive 40-point game.

After putting up a season-high 47 points his last time out against the Atlanta Hawks on Friday, James almost matched it against Charlotte, scoring a game-high 43 points on 16-of-26 shooting with 11 rebounds and six assists.

He was the only Lakers player to score more than 18 points, as Thomas Bryant played strong supporting role with 18 points (nine-of-17 shooting) and 15 rebounds.

The Lakers have now won three of their past four to improve to 16-21 – four games behind the Sacramento Kings (19-16) in the Western Conference's sixth seed.

Nets make it 12 in a row

The Brooklyn Nets own this season's longest winning streak after rattling off their 12th in a row with a 139-103 drubbing of the San Antonio Spurs.

Brooklyn's two offensive centrepieces were both at the top of their game. Kevin Durant scored 25 points on wildly efficient 10-of-14 shooting with 11 assists, while Kyrie Irving scored his game-high 27 points on 11-of-14 shooting.

The highlight of the game came when Irving crashed the offensive rebounds on a Yuta Watanabe miss, rising up for a surprising put-back dunk that sent the Barclays Center crowd into raptures.

Brooklyn are now 25-12 after beginning the season 1-5, and trail the Boston Celtics (26-11) by one game in the race for the league's best record.

The New Orleans Pelicans will likely be without franchise player Zion Williamson for at least the next week after suffering a hamstring injury in Monday's 120-111 loss to the Philadelphia 76ers.

It was late in the third quarter when the injury occurred, with the Pelicans trailing 84-81, as Williamson pushed the ball in transition before sharply pulling up, holding his right hamstring.

He had 26 points on 10-of-12 shooting, adding seven assists and six rebounds in his 28 minutes before the incident, with the 76ers taking the fourth period 36-30 following his departure.

Speaking after the game, Pelicans head coach Willie Green confirmed the injury as a right hamstring strain.

"It was right at a pivotal moment in the game," he said. "We'll get some imaging and look at him and hopefully he's okay. It was a tough loss for us."

Williamson has played in 28 of the Pelicans' 37 games up to this point after missing the entire 2021-22 season, and had rediscovered his best form in December.

He averaged 29.8 points, 7.5 rebounds and 5.1 assists per game while shooting 61.3 per cent from the field during his 12 games in December, picking up the slack while team-mate Brandon Ingram has been sidelined.

Joel Embiid ended up as the star of the 76ers' win, scoring a game-high 42 points with 11 rebounds and five assists.

Monday's fixture between the Buffalo Bills and the Cincinnati Bengals has been officially suspended after Bills safety Damar Hamlin collapsed on the field and was taken away in an ambulance.

Hamlin, 24, had made a tackle on Bengals receiver Tee Higgins, and after briefly returning to his feet, he collapsed.

He remained down for over 10 minutes, and was seen receiving CPR before being loaded into an ambulance and taken to a local hospital.

All players and team personnel returned to the locker room and over an hour passed before the NFL decided to officially call off the rest of the night's proceedings.

A statement from the league confirmed Hamlin is in "critical condition".

It read: "Tonight’s Buffalo Bills-Cincinnati Bengals game has been postponed after Buffalo Bills' Damar Hamlin collapsed, NFL Commissioner Roger Goodell announced.

"Hamlin received immediate medical attention on the field by team and independent medical staff and local paramedics. He was then transported to a local hospital where he is in critical condition.

"Our thoughts are with Damar and the Buffalo Bills. We will provide more information as it becomes available.

"The NFL has been in constant communication with the NFL Players Association which is in agreement with postponing the game."

The game was called off halfway through the first quarter with the Bengals leading 7-3.

Monday's game between the Buffalo Bills and the Cincinnati Bengals has been temporarily suspended after a scary situation unfolded as safety Damar Hamlin collapsed and was taken off the field in an ambulance.

The incident occurred during the first quarter, after Hamlin made a tackle on Bengals receiver Tee Higgins. He briefly returned to his feet, before collapsing.

He remained down for over 10 minutes as ESPN's broadcast reported he was receiving emergency CPR before being loaded onto a stretcher and into a waiting ambulance.

The game was temporarily suspended with the Bengals leading 7-3, with both teams heading back to the locker room as they anxiously await an update on Hamlin's health.

New York Knicks All-Star Julius Randle believes his side are figuring things out defensively after smothering the Phoenix Suns 102-83 on Monday.

The Knicks began the season shaky on the defensive end, posting the seventh-worst defensive rating in the league during their 16 games in November, giving up 115.1 points per 100 possessions.

They were a different team in December, limiting teams to 108.2 points per 100 possessions for the third-best defense, and that included a five-game losing streak at the end of the month where they conceded at least 113 points in each defeat.

But after getting back on the right track with a 108-88 victory against the Houston Rockets on New Year's Eve, the Knicks held their second consecutive opponent under 90 points for the second time this season, illustrating how imposing they can be on that end of the floor when they are switched on.

Their back-to-back defensive masterclasses have boosted the Knicks to the eighth-ranked defense for the season, with every team ahead of them essentially already pencilled into the playoffs.

Against the Suns, Randle received MVP chants from the Madison Square Garden crowd as he led the way with a game-high 28 points (seven-of-18 shooting), a game-high 16 rebounds and an equal team-high six assists.

It was a great way to start January after he put up terrific figures of 28.3 points, 11.4 rebounds and 4.3 assists on 47.8 per cent shooting in December, rediscovering the form that made him an All-Star in the 2020-21 season.

Speaking to the media after the game, the man who has endured his fair share of criticism from Knicks fans said "it's good to be on the good side of The Garden", before breaking down what has been behind their strong form.

"Defensively, we had to get back to our ways," Randle said. "When we won eight in a row, the defensive end was big for us. We feel that rhythm and chemistry coming back on that end."

Randle also spoke about how the addition of point guard Jalen Brunson in the offseason has helped his game.

"Honestly, it’s a lot easier [to score this season]," he said. "I attributed a lot of that to Jalen [Brunson], obviously.

"Also [Immanuel Quickley], and our guards… I’m not having to work as hard to get buckets or score. So, the game is a lot easier on my body."

When asked if he has put any thought into a potential return to All-Star Weekend, Randle said he is hoping to get another chance to share that experience with his loved ones.

"Obviously, you work hard to put yourself in a position to do that," he said. "So it would be amazing [to play in the All-Star Game]. 

"I love it. Not necessarily for me, obviously it is great, but I love it to be able to experience it with my family because they’re the ones that really make the true sacrifice, and have led me to dedicate myself to the game the way I’ve been able to do in the summers, and night-in, night-out.

"So I love to be able to let them enjoy it and see the rewards of it and stuff like that, that’s why it’s important. But for me, whatever the team needs night-in and night-out – whatever it is – I just want to help the team."