Russian and Belarusian players, including ATP world number one Daniil Medvedev, will still be able to compete on the Tours and at grand slams, but the International Tennis Federation (ITF) has suspended the countries' teams.
Russia's Medvedev was only crowned world number one for the first time on Monday, though that success came amid the backdrop of an ongoing conflict between his nation and Ukraine.
To widespread international condemnation, Russia invaded Ukraine on Thursday, with that conflict since escalating further. Belarus, meanwhile, was effectively used as a staging post for part of the invasion force, though Belarusian president Alexander Lukashenko has insisted the nation's military did not and will not play any part in any operation.
Governments and organisations around the world, including governing bodies within sport, have responded with strict sanctions against Russia and certain individuals with links to president Vladimir Putin.
On Tuesday, the governing bodies of tennis (the ITF, ATP, WTA and the four grand slam events) announced sanctions of their own.
While Medvedev and other Russian and Belarusian players, including Andrey Rublev and WTA world number three Aryna Sabalenka, will be allowed to play in tournaments on both the men's and women's Tours, and the four grand slams, they will have to compete under neutral banners, with the flags of each country banned.
However, the WTA and ATP combined event in Moscow, scheduled to take place in October, has been suspended.
Meanwhile, Russia and Belarus have had their memberships of the ITF revoked, while all ITF tournaments set to be held in those countries have been suspended indefinitely.
Russia hold both the Davis Cup and Billie Jean King Cup.
The immediate upshot of the decision is that Elina Svitolina, the Ukrainian who is top seed at the Monterrey Open, will play her first-round match against Anastasia Potapova on Monday.
Svitolina said earlier in the day that she would refuse to play against any Russian or Belarusian opponent unless all national emblems, flags and colours were removed.
However, prior to the joint announcement from tennis' governing bodies, Svitolina told ITV News: "There's been a lot of discussion.
"Today they will release a statement that they will remove the flags. So we are waiting just for the final confirmation about that. I will be playing tonight because my opponent is going to be under a neutral flag."
Svitolina has pledged to donate all of her prize money from upcoming tournaments to assist Ukraine's fight against Russia.
The statement from tennis' governing bodies read: "A deep sense of distress, shock and sadness has been felt across the entire tennis community following Russia's invasion of Ukraine in the past week.
"Our thoughts are with the people of Ukraine, and we commend the many tennis players who have spoken out and taken action against this unacceptable act of aggression. We echo their calls for the violence to end and peace to return.
"The safety of the tennis community is our most immediate collective priority. The focus of the WTA and ATP in particular in recent days has been on contacting current and former players, and other members of the tennis community from Ukraine and neighbouring countries, to check on their safety and offer any assistance."
Sinner inspires comeback to help Italy reach Davis Cup semi-finals
Jannik Sinner kept Italy's hopes of retaining the Davis Cup alive after winning matches in the singles and doubles to inspire a 2-1 comeback triumph over Argentina on Thursday.
Sinner and Matteo Berrettini edged Maximo Gonzalez and Andres Molteni 6-4 7-5 in the deciding game to set up a rematch of last year's showpiece against Australia in the final four.
However, the Italians started off on the back foot when Francisco Cerundolo downed Olympic bronze medallist Lorenzo Musetti 6-4 6-1 in an hour and 29 minutes.
Musetti converted just two of the eight break points he was presented with, as Cerundolo put Argentina on the brink of reaching the semi-finals for the first time since 2016.
But two-time grand slam champion Sinner, who won the ATP Finals last weekend, carried his momentum forward from Turin against Sebastian Baez.
The world number one breezed to a 6-2 6-1 win over his opponent, serving seven aces to the Argentine's one, while also saving all four break points he faced.
Sinner then returned to the court alongside Berrettini, with the pair replacing Simone Bolelli and Andrea Vavassori in the must-win clash.
The pair won 90% of their first-serve points and fended off all five break points they faced, earning a key break at 5-5 in the second set before surging to victory.
"It was a must-win match," said Sinner. "Very different conditions. The court is very, very fast and tough to play.
"I haven't had so much time to adapt to the conditions, but I'm happy about today."
Data Debrief: The Italian Job
Italy edged closer to becoming only the sixth nation to retain the Davis Cup since the final stage was introduced 52 years ago, and first since the Czech Republic in 2013.
But they were inspired by Sinner once again, who proved why he will end the year at the summit of the ATP rankings.
And after leading Italy to their first Davis Cup title since 1976 with a victory against Australia's Alex de Minaur last year, he will fancy his chances this time around.
Ebden and Thompson send Australia to third straight Davis Cup semi
Matthew Ebden and Jordan Thompson booked Australia's place in the Davis Cup semi-finals after the pair clinched their deciding match against the United States to win 2-1.
The pair, who won gold at the Paris Olympics, beat Tommy Paul and Ben Shelton 6-4 6-4 to put Lleyton Hewitt's side into their third successive semi-final at the men's team event.
Australia, who have won the tournament 28 times, largely had Thanasi Kokkinakis to thank after his remarkable triumph over Shelton in the first match of the day.
Kokkinakis saved four match points and let slip six of his own before eventually prevailing 6-1 4-6 7-6 (16-14) in an engrossing encounter that lasted two hours and 14 minutes.
However, in the rematch of a recent ATP Finals group-stage match, Taylor Fritz emerged victorious over Alex De Minaur as he did in Turin a week ago.
Despite De Minaur going 2-0 up in the second set, Fritz roared back to earn a 6-3 6-4 victory to send the tie the distance in Malaga.
But Australia held their nerve, and will discover their opponents later on Thursday when reigning champions Italy take on Argentina.
Ebden and Thompson’s win came after United States’ captain Bob Bryan opted for a late change, with Paul and Shelton replacing Austin Krajicek and Rajeev Ram.
“We were expecting the other pair, but we knew they’ve got incredible players who can play doubles,” said Ebden.
“We were ready. A slight adjustment obviously. More huge serving singles players than the doubles craft, maybe, but it was just as big a challenge as any.
"Out here, finals live match, just to play with Jordan here was real fun. Following what Kokk did, unfortunately Alex went down, but what a day. So fun, so happy.”
Data Debrief: Australia ready to right Davis Cup wrongs
Australia have failed to win the Davis Cup since 2003, but they will be confident of halting that streak this time around.
If they take the trophy, they will have reason to thank Kokkinakis, whose tie-break win against Shelton was the longest an Australian player had featured in at the tournament, surpassing Pat Rafter's win over David Rikl in the 1997 quarter-finals of the competition (15-13).
Ebden and Thompson also shone when it mattered most, serving four aces compared to Paul and Shelton's two, while also winning 92% of their first-serve points.
Paolini and Bronzetti seal fifth Billie Jean King Cup for Italy
Victories for Jasmine Paolini and Lucia Bronzetti handed Italy their fifth Billie Jean King Cup title as they overcame Slovakia in Wednesday's final in Malaga.
Italy, who were beaten in last year's final by Canada, overcame Poland in the semi-finals on Monday as Paolini partnered Sara Errani for a decisive doubles win over world number two Iga Swiatek and Katarzyna Kawa.
The showpiece contest began with Bronzetti triumphing 6-2 6-4 against Viktoria Hruncakova, before Paolini took to the court to face Rebecca Sramkova.
The world number four – who won doubles gold at the Paris Olympics in August to cap her breakout year – eased past Sramkova by a 6-2 6-1 scoreline to ensure a doubles match was not required.
Speaking after Italy claimed the trophy for the first time since 2011, Bronzetti heaped praise upon her team-mate and revealed she had struggled to sleep before playing in front of 12-time grand slam champion King.
"Jasmine raised her level really high this year. She's an example for all of us," Bronzetti said.
Asked about King's presence in the crowd, Bronzetti added: "She is a great person, a great legend. I didn't sleep very well.
"You're not playing just for yourself. You're playing for your team and your country. We all want this trophy, and it is our dream, all Italians."
Data Debrief: Five-star Italy
Italy have claimed their fifth Billie Jean King Cup, having previously triumphed in 2006, 2009, 2010 and 2013.
Only the United States (18), Czechoslovakia/Czechia (11) and Australia (seven) have won more. Spain and Russia (also including the USSR and Russian Tennis Federation) have also tasted success five times.
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