23:52 CET - Casper Ruud has got Team Europe off to a winning start, battling his way to a 6-4, 7-6 win over Reilly Opelka in exactly 90 minutes.
21:03 CET - After a thrilling day of action in the Billie Jean King Cup, we now have team action on the men's side of the game, with the Laver Cup - tennis' equivalent to the Ryder Cup and the brainchild of Roger Federer - beginning in San Francisco tonight.
The first battle between Team Europe and Team World will be between Casper Ruud and Reilly Opelka, and that will be followed by a clash between Jakub Mensik and Alex Michelsen.
Then, as we enter the early hours of the morning in Europe, Flavio Cobolli and Joao Fonseca will do battle before Mensik and Carlos Alcaraz face Michelsen and Taylor Fritz in the first doubles match of the tournament.
19:33 CET - Two final results to bring you from Hangzhou, with Aleksandar Vukic surviving a second-set wobble to defeat David Goffin 6-4, 1-6, 6-1 and Valentin Royer coming from behind to beat Aleksandar Kovacevic 4-6, 7-6(6), 6-3.
17:55 CET - Defending champions Italy are through to the BJK Cup final after Jasmine Paolini and Sara Errani proved too strong in the decisive doubles rubber, beating Marta Kostyuk and Lyudmyla Kichenok of Ukraine, 6-2, 6-3.
They'll now face the winner of tomorrow's second semi-final between USA and Great Britain in Sunday's showpiece.
15:46 CET - Jasmine Paolini delivers! The world number eight has fought back from a set down to win a thrilling clash with Elina Svitolina 3-6, 6-4, 6-4, with the deciding set alone lasting over an hour.
The two nations will now contest a doubles decider.
14:47 CET - The second singles rubber between Italy's Jasmine Paolini and Ukraine's Elina Svitolina at the BJK Cup is into a deciding set.
Follow the rest of the match right here.
13:24 CET - Marta Kostyuk has given Ukraine a 1-0 lead in their BJK Cup semi-final against Italy after seeing off Elisabetta Cocciaretto in straight sets, 6-2, 6-3.
Meanwhile, Brandon Nakashima and Arthur Cazaux have claimed victories in China.
11:55 CET - Play in Seoul has been called off for the day due to rain, and the quarter-finals and semi-finals will all be played tomorrow instead.
10:48 CET - Christopher O'Connell is the latest man through in Chengdu after a routine 6-2, 6-4 win over Yi Zhou, while Sebastian Korda has beaten Adam Walton 7-5, 6-3 in Hangzhou.
Elsewhere, rain continues to delay the start of play in Seoul, with Iga Swiatek's mouthwatering quarter-final clash against Barbora Krejcikova still scheduled to take place this morning.
08:56 CET - Alejandro Tabilo and Marcos Giron are through to the quarter-finals in Chengdu after straight-set wins over Luciano Darderi and Lorenzo Sonego, respectively.
Meanwhile, in Hangzhou, Aussie Rinky Hijikata has advanced after a hard-fought 7-6(2), 6-4 triumph against Camilo Ugo Carabelli.
07:30 CET - Good morning and welcome to our coverage of today's tennis!
It promises to be a jam-packed day of action, as defending champions Italy face Ukraine in the first BJK Cup semi-final, before the Laver Cup gets underway this evening with Casper Ruud taking on Reilly Opelka.
Meanwhile, in Asia, there are plenty of matches to look forward to at tournaments in Seoul, Chengdu and Hangzhou, including Iga Swiatek's blockbuster clash against Barbora Krejcikova.
Check out the full draw in Seoul, Chengdu and Hangzhou via the links.
