23:58 CET - Eva Lys (22) was tested by Turkish player Zeynep Sonmez (22), but in the end, she had more than enough to come out on top 7-5, 6-3.
And on that note, that'll be all from the Tennis Tracker today, make sure you tune in tomorrow for some more Davis Cup and WTA semi-finals.
23:04 CET - Aussie Olivia Gadecki (22) is the first woman into the Guadalajara semi-finals, beating Martina Trevisan (30) 6-2, 3-6, 6-1.
22:37 CET - Italy have defeated Belgium in their Davis Cup tie, coming out on top in the final doubles rubber, 7-6(2), 7-5.
21:59 CET - In the first quarter-finals of the day in Monastir, Rebecca Sramkova (27) and Lucia Bronzetti (25) both claimed wins to move into the final four.
20:55 CET - Carlos Alcaraz (21) was in formidable form as he eased past Ugo Humbert (26) 6-3, 6-3, putting Spain 2-0 up against France and consequently, the victory in the tie.
20:12 CET - Belgium's Zizou Bergs (25) has secured a superb 6-3, 6-7(5), 6-0 win over Flavio Cobolli (22), making the score 1-1 in their tie with Italy ahead of the final doubles rubber.
19:10 CET - France and Spain have played the first game of their tie as Arthur Fils (20) has been beaten by Roberto Bautista-Agut (36) in three sets 2-6, 7-5, 6-3 to take an early lead.
19:00 CET - Argentina are into the Final Eight in this year's Davis Cup after Francisco Cerundolo (26) saw off US Open semi-finalist Jack Draper (22) in straight sets 7-6, 7-5.
17:15 CET - Over to Italy's Davis Cup tie with Belgium as Matteo Berrettini (28) has seen off Alexander Blockx (19) 3-6, 6-2, 7-5 to give his side the advantage.
16:23 CET - After a marathon second set, Tomas Martin Etcheverry (25) has overcome Dan Evans (34) in their Davis Cup encounter in straight sets. The Argentinian won the match 6-2, 7-5 to take the first point of the encounter.
14:20 CET - Having already secured their spot in the quarter-finals following Brandon Nakashima's (23) win earlier, the USA completed a clean sweep over Slovakia with victory in the final doubles rubber.
Austin Krajicek (34) and Rajeev Ram (40) recovered from a set down to defeat Norbert Gombos (34) and Lukas Klein (26) 6-7(4), 7-6(4), 10-1.
11:45 CET - The USA have taken an unassailable 2-0 lead in their tie against Slovakia, with the in-form Brandon Nakashima (23) sweeping aside Jozef Kovalik (31) 6-3, 6-3.
09:48 CET - Mackenzie McDonald (29) has given the USA a perfect start in their tie against Slovakia after seeing off the challenge of Lukas Klein (26) in straight sets 6-4, 6-3.
09:05 CET - There was a shock result overnight in Guadalajara, with top seed Jelena Ostapenko (27) squandering four match points as she fell to a disappointing 6-3, 5-7, 7-6(0) defeat to Marina Stakusic (19).
Check out the full schedule in Guadalajara here.
08:30 CET - Good morning and welcome to our coverage of today's tennis action!