Stefanos Tsitsipas got the better of Alexei Popyrin to tighten his grip on top spot in the Ultimate Tennis Showdown after the third weekend of the series.

Greek rising star Tsitsipas came from behind to sneak a 3-2 success over Spanish veteran Feliciano Lopez on Saturday, and he followed that on Sunday with a 3-1 triumph against Australian prospect Popyrin.

The behind-closed-doors and unorthodox tournament is being staged across five consecutive weekends at the Cote d'Azur tennis academy run by Serena Williams' coach Patrick Mouratoglou, with a quickfire format aimed at attracting new fans to the sport.

Each match consists of four 10-minute quarters, rather than sets, with a point going to the winner of each quarter.

A sudden-death tie-break follows at the end of the match if scores are level at two quarters each, with the first player to take back-to-back points declared the winner.

World number six Tsitsipas has now won five of his six matches in the competition, putting him ahead of Italian Matteo Berrettini and France's Richard Gasquet, who each have won four times but lost twice.

Dominic Thiem, who has played just four matches, has won three times and lost once, and this weekend the Austrian world number three earned 3-1 successes over David Goffin and Berrettini.

Gasquet suffered a 4-0 loss to Berrettini on Saturday but bounced back by beating fellow Frenchman Corentin Moutet 3-1 on Sunday.

Andy Murray is "really pumped" about the US Open, according to Feliciano Lopez.

Three-time grand slam champion Murray was nearing a return from injury when the ATP Tour season was suspended in March due to the coronavirus pandemic.

There remains uncertainty over when the campaign will resume and whether the US Open, scheduled to start in August, will be played.

Lopez said Murray, who he has played doubles with in the past, was looking forward to the event in the United States.

"We are in touch every two weeks or so. We text each other," the Spaniard told UK media.

"Two days ago I was talking to him, and he was really pumped about the US Open. He was starting to practise again. I asked about the hip, how it was feeling, and he was positive.

"He might be able to compete again. I'm crossing my fingers to see Andy playing again, of course. It would be great for everybody, especially for him."

With travel restrictions in place in many countries around the world, just how the ATP Tour season can resume remains to be seen.

But Lopez is eager for it to get back underway, saying: "I think we need to start playing tennis as soon as possible, this situation can't last for longer.

"We need to play, the players, the tournaments, the ATP, we need to resume. It's been already a long time, there's a lot of people struggling."

Stefanos Tsitsipas beat Benoit Paire in his first match in the 2020 Ultimate Tennis Showdown.

The event in France, created by Serena Williams' coach Patrick Mouratoglou, is aimed at attracting new fans to the sport and is one of the first tennis tournaments to take place since the coronavirus pandemic struck Europe.

The event is played in a league format, with each match consisting of four quarters and a sudden-death fifth if the scores are level.

On Sunday, world number six Tsitsipas defeated Paire 3-1, hitting more than 30 winners en route to victory.

Gasquet beat David Goffin 3-2 after sudden death, with Feliciano Lopez overcoming Lucas Pouille by the same scoreline.

The UTS' first match was won by Alexei Popyrin against Frenchman Elliot Benchetrit, while Matteo Berrettini also claimed a 3-1 victory over Dustin Brown.

Denis Shapovalov was surprisingly beaten in straight sets by 21-year-old Ugo Humbert at the Auckland Open on Friday.

A day after first and third seeds Fabio Fognini and Karen Khachanov were knocked out, second seed Shapovalov was beaten 7-5 6-4.

Humbert, who broke serve in the final game of each set, described the win as "one of the biggest of my career" as he set up a semi-final against John Isner.

The American was taken to two tie-breaks by Kyle Edmund but prevailed 7-6 (7-5) 7-6 (7-5), his 25 aces getting him over the line as he seeks a third title in Auckland.

Benoit Paire reached his first semi-final at the event, coming from a set down to beat John Millman 3-6 6-1 6-4.

The fifth seed will face Hubert Hurkacz, who spurned six second-set match points in a mammoth tie-break before eventually seeing off Feliciano Lopez 6-4 6-7 (11-13) 6-4.

At the Adelaide International, home favourite Alex Bolt was soundly beaten by Felix Auger-Aliassime, the Canadian needing just 55 minutes to win 6-3 6-0.

He will meet Andrey Rublev in the last four after the Russian battled past Dan Evans 6-4 3-6 6-3 in just over two hours.

Spanish hopes were extinguished in the quarter-finals, where Tommy Paul surprised Albert Ramos-Vinolas to win 6-3 6-4 and Lloyd Harris beat fourth seed Pablo Carreno Busta 6-3 6-3.

Spain will face Canada in Sunday's Davis Cup final after Rafael Nadal and Feliciano Lopez edged the hosts past Great Britain.

A gripping semi-final saw the singles split and the tie came down to drama in the doubles on Saturday.

The Spanish duo, in front of a partisan crowd in Madrid, survived a major test as Nadal and Lopez needed two tie-breaks to fend off Jamie Murray and Neal Skupski.

With Andy Murray roaring on the British team from courtside, his older brother and Skupski pushed Nadal and Lopez through two intense sets before falling just short, losing 7-6 (7-3) 7-6 (10-8).

The British pair had set points to take it to a decider, but Spain, and Nadal in particular with one sublime overhead after a brilliant reach, produced their best when the pressure was at its greatest.

It was always likely Britain would need Kyle Edmund to win his singles rubber and he duly delivered with a 6-3 7-6 (7-3) win against Lopez – a late stand-in for the injured Pablo Carreno Busta.

But Nadal coasted to a 6-4 6-0 beating of Dan Evans, who tailed off after putting up a valiant effort in the first set against his more illustrious opponent.

And after the late-night doubles joy, with the contest finishing well after midnight, Nadal said: "I think we played a great match. 'Feli' served great the whole match and at important moments he did everything well.

"Thank you very much to Feli and the rest of the team."

Lopez said: "There was a lot of drama today on the court. We are very pleased we somehow managed to play those points in a very good way.

"It was a lot of drama but this is what you expect when you play this kind of match. I think we have a very good opportunity tomorrow to lift this cup."

Earlier, Canada reached the Davis Cup final for the first time in their history by winning a similarly thrilling tie against Russia.

Denis Shapovalov kept Canada in with a chance by beating Karen Khachanov 6-4 4-6 6-4 after Andrey Rublev overcame Vasek Pospisil 6-4 6-4.

And the Canadian duo defeated their Russian rivals 6-3 3-6 7-6 (7-5) in a thrilling deciding doubles rubber.

Karen Khachanov thrilled the Moscow crowd as he saved five match points before overcoming veteran Philipp Kohlschreiber at the Kremlin Cup.

The world number eight, top seed and defending champion at the ATP 250 event, found himself 5-3 down in the decider but refused to buckle as Kohlschreiber eyed a notable scalp on his 36th birthday.

Khachanov – now the focus of home hopes after Daniil Medvedev's withdrawal due to fatigue - repelled three match points to force a tie-break and his calmness from the baseline saw him through more trouble to prevail 3-6 6-3 7-6 (9-7).

Andreas Seppi is up next for Khachanov after the experienced Italian similarly came from a set down to beat Roberto Carballes Baena 5-7 6-1 6-3.

Serbian fourth seed Dusan Lajovic also went the distance against Lukas Rosol, coming through 6-4 6-7 (8-6) 6-3 to beat his Czech opponent and set up a quarter-final clash against last year's runner-up Adrian Mannarino – a straight-sets winner over Mikhail Kukushkin.

Stan Wawrinka returned to action at the European Open, competing for the first time since his US Open quarter-final loss, and his troublesome knee was given a thorough workout by Feliciano Lopez.

The two seasoned campaigners provided plenty of entertainment - a sumptuous backhand half-volley at the net in the first set serving as a particular highlight from Wawrinka, who came through 6-7 (4-7) 6-4 7-6 (7-4).

The 34-year-old Swiss will take on Gilles Simon in the quarter-finals after the world number 47 came through his all-French clash against Jo-Wilfried Tsonga 6-4 7-5.

Andy Murray will face Pablo Cuevas in round two after the eighth-seeded Uruguayan beat Hugo Dellien 6-4 6-3, while Guido Pella ensured further South American success by beating Kwon Soon-woo 7-5 7-5 to earn a quarter-final place.

Frances Tiafoe's reward for breaking a three-match losing streak, defeating Yannick Maden, will be a meeting with another German opponent in Jan-Lennard Struff.

At the Stockholm Open, US Open semi-finalist and second seed Grigor Dimitrov was dumped out by Sam Querrey, losing 6-7 (7-9) 6-3 7-6 (7-3). Taylor Fritz was another seed to fall – 7-5 6-4 against Yoshihito Nishioka,

Filip Krajinovic is up next for Nishioka after beating Dan Evans 7-5 2-6 6-3.

Andy Murray advanced to the second round at the European Open with a straight-sets win over Kimmer Coppejans.

The former world number one triumphed 6-4 7-6 (7-4) to win a match in two sets for just the second time since August.

He was made to work hard by Coppejans, who broke Murray three times in total, including in his first two service games in the second set, but the Briton eventually prevailed in an hour and 45 minutes.

Seventh seed Jan-Lennard Struff dropped just three games in beating Gregoire Barrere, while Gilles Simon and Feliciano Lopez were among the other players to advance.

At the Kremlin Cup, home hope Andrey Rublev overcame Alexander Bublik 6-1 3-6 6-4.

After taking the opener, Rublev then lost the first five games in a row en route to losing the second set and the sixth seed was a break down in the decider only to rally and progress.

Ivo Karlovic staved off a match point and won a third-set tie-break against Aljaz Bedene to progress, along with Jeremy Chardy and Philipp Kohlschreiber, who beat Nicolas Jarry and Pierre-Hugues Herbert respectively.

Pablo Carreno Busta was the only seed in action at the Stockholm Open and he defeated John Millman 6-4 6-3, with Sam Querrey among those to also go through.

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