15:15 CET - Spain made a late call to field Pedro Martinez instead of Munar and it's looking like a good decision, with Rune losing the first set 6-1.
13:36 CET - Spain have stayed alive in their tie against Denmark, prevailing 1-6, 6-3, 6-2 in what was a must-win doubles clash for them.
Denmark still lead 2-1 though, and Holger Rune now has the chance to send them through in his match with Jaume Munar.
12:31 CET - Belgium move into the final eight! They've edged past Australia thanks to Raphael Collignon, who has beaten Alexander Vukic 6-7, 6-2, 6-3.
10:03 CET - Australia have levelled their tie against Belgium at 2-2, with Alex de Minaur proving too strong for Zizou Bergs in a convincing 6-2, 7-5 triumph.
Follow the final singles rubber here.
08:48 CET - Today's biggest final comes at the WTA 500 event in Guadalajara as rising American star Iva Jovic takes on Emiliana Arango. That clash is due to get underway at 23:00 CET this evening.
Meanwhile, in Sao Paulo, Indonesia's Janice Tjen comes up against Tiantsoa Sarah Rakotomanga Rajaonah, with both players targeting a maiden title on the WTA Tour.
There's also plenty of Davis Cup action throughout the day as Belgium, Australia, Denmark and Spain all look to advance to the final eight.
Follow this morning's first singles match between Alex de Minaur and Zizou Bergs right here.
07:55 CET - Good morning and welcome to our coverage of today's tennis!