Spain are the first nation to join exempted France, Australia, Czech Republic and hosts Hungary in the revamped finals taking place in April.
Tennis's flagship team events the Davis Cup and Fed Cup Finals have been postponed until 2021 because of the COVID-19 pandemic, the International Tennis Federation (ITF) said on Friday. Professional tennis has been suspended since March and will not return until August.
Svetlana Kuznetsova and Anna Chakvetadze recorded contrasting victories against Italian opponents in Moscow.
Jelena Jankovic steered Serbia into their first Fed Cup final when she thrashed Svetlana Kuznetsova 6-1, 6-4 in the second reverse singles on Sunday.
Kim Clijsters powered Belgium into their second Fed Cup final with a comfortable 6-0, 6-1 win over American teenager Vania King.
Hot favourites Russia will take on an under-strength France in the Fed Cup final after both nations completed 5-0 wins in the semis.
Roberta Vinci sent Italy into the Fed Cup final for the fifth time in eight years with a 6-2, 6-7, 6-3 victory over CzechRepublic's Lucie Safarova in Palermo on Monday.
The world number two was not invited by team captain Shamil Tarpishchev after she pulled out of last week's semi-final against the United States citing a shoulder injury.
Petra Kvitova put defending champions the Czech Republic into the Fed Cup final with a 6-4, 7-6 win over Italy's Francesca Schiavone on Sunday.
Russia have been dealt a huge blow ahead of this weekend's Fed Cup final against the Czech Republic after their number one player Vera Zvonareva was ruled out because of a shoulder injury.
Italy overthrew champions Russia 4-1 on Sunday to book a Fed Cup final meeting with the United States, who staged a stunning comeback to grab a 3-2 win in the Czech Republic. Francesca Schiavone beat Anastasia Pavlyuchenkova 7-6, 4-6, 6-2 to seal victory in the fourth rubber of the semi-final for 2006 winners Italy, who were at home on clay at Castellaneta Marina.
Russia took a commanding 2-0 lead in the Fed Cup final on Saturday after top 10 players Vera Zvonareva and Svetlana Kuznetsova overpowered their Spanish rivals to put the holders within reach of a fourth title in five years. World number nine Zvonareva beat Anabel Medina Garrigues 6-3, 6-4 in the opening rubber of the five-match tie on Saturday before Svetlana Kuznetsova dismissed 20-year-old Carla Suarez 6-3, 6-1.
A summary of sports events and sports persons, who made news on Sunday
The 11-time champions edged out Dempo Sports Club 5-4 via sudden death to scrape into the final.
Indian women stormed into the finals of the Fed Cup (Group-II) Asia-Oceania tennis tournament in Hyderabad following another one-sided 2-0 victory over Turkmenistan.
The world number two said she wants to concentrate on the 2005 season.
I-League champions Dempo ousted reigning champions Salgaocar from the 34th Federation Cup with a clinical 2-0 victory on Friday to set up a summit clash against last year's runners-up East Bengal. The final is on Sunday.
Twice lucky on their road to the third successive Federation Cup football final, two-time defending champions East Bengal will take on I-League winners Salgaocar in the title clash of the 33rd edition of the tournament, in Kolkata on Thursday.
The club alleged that two of their fans were killed in police lathi-charge during the semi-final against Mohun Bagan.
The world number three will play in the final against Italy in September despite an initial threat from her coach that she would boycott the squad.
Belgium's Fed Cup captain Carl Maes has urged Justine Henin-Hardenne to play in September's final against Italy after her coach cast doubt over her participation.
Nadia Petrova and Elena Vesnina beat Wimbledon champion Venus Williams and Lisa Raymond in the decisive doubles contest to give Russia a 3-2 win over the United States in their Fed Cup semi-final on Sunday in Stowe, Vermont.
Barty had some trouble in the first set against the two-time Australian Open champion and saved three break points at 5-5 to go on to win 7-6(2), 6-3 and level the tie at 1-1.
World No 4 Del Potro is still sidelined with a right knee injury sustained in Shanghai last month.
Barbora Strycova beat Alize Cornet 6-2, 7-6(4) to put defending champions Czech Republic level at 2-2 against hosts France and send the Fed Cup final into a doubles decider on Sunday.
Ash Barty ended Australia's 44-year wait for a home winner at the Australian Open when the world number one staved off a fightback from American Danielle Collins to complete a 6-3, 7-6(2) win.
World number one Ash Barty became the first Australian woman to win the Wimbledon singles title for 41 years on Saturday when she defeated Czech Karolina Pliskova in the final.
Ashleigh Barty lifted the season-ending WTA Finals trophy and led Australia to their first Fed Cup final since 1993, while Nadal won his 4th ITF Award for winning two Slams this season.
Barty says she hopes to earn a more coveted medal at the 2020 Tokyo Olympics.
Victoria Azarenka will miss this week's Fed Cup final in Minsk against the United States due to an ongoing custody battle with her baby son's father, the former world number one said on Tuesday.
The Czech Republic cruised to a 2-0 lead after the opening singles of the Fed Cup final against Serbia on Saturday, putting them well on course to successfully defend their title.
Karolina Pliskova and Petra Kvitova won their opening singles matches to give Czech Republic a commanding 2-0 lead in their Fed Cup semi-final against Germany in Stuttgart on Saturday.
Kveta Peschke and Lucie Hradecka beat Maria Kirilenko and Elena Vesnina 6-4, 6-2 in the decisive doubles to give the Czech Republic a 3-2 win over Russia in the Fed Cup final on Sunday, clinching the country's first title as an independent nation.
Anastasia Pavlyuchenkova overpowered Lucie Safarova 6-2, 6-4 in the second reverse singles to pull Russia level with the Czech Republic at 2-2 in their Fed Cup final on Sunday.
A nagging knee injury has forced Venus Williams to skip the rest of the 2010 tennis season, including next month's Fed Cup final between the United States and Italy.
When Italy won the Fed Cup final last weekend, the screaming crowds and the buzzing media covering the event showed just how much tennis has moved up on the public radar in the soccer-mad nation.