The 2026 Adelaide International has delivered plenty of drama in the opening three days, with a series of upsets and several standout matches.
On the men’s side, fourth seed Tallon Griekspoor and seventh seed Stefanos Tsitsipas suffered early exits.
The women’s draw has also seen its share of surprises. Top seeds Mirra Andreeva and Madison Keys advanced, as did Emma Navarro, but fourth seed Ekaterina Alexandrova and fifth seed Clara Tauson were knocked out.
With quarterfinal action set on both the men’s and women’s sides, here is a look at the predictions for all the singles matches on Day 4:
# Madison Keys vs Victoria Mboko
Keys made a commanding start to her title defence, defeating Tereza Valentova 6–4, 6–1. She was particularly effective on return, converting five of her six break-point opportunities. Keys, however, experienced some difficulties on serve, committing nine double faults and winning just 68% of points behind it.
Mboko, meanwhile, has battled her way through a couple of three-set victories against Beatriz Haddad Maia and Anna Kalinskaya. She has also struggled on serve, but has been impressive in key moments, particularly when pressing forward and finishing points at the net.
Keys enters this first matchup between the pair as the clear favorite, given her experience and strong record on hard courts. While Mboko could pose a threat if she sharpens her serve, Keys appears well-positioned to advance if she maintains her level of consistency.
Pick: Keys in straight sets.
# Mirra Andreeva vs Maya Joint
Andreeva responded emphatically to her quarterfinal exit in Brisbane last week, opening her Adelaide campaign with a dominant 6–3, 6–1 victory over Marie Bouzkova. She was outstanding on return, converting five of seven break points and winning 25 of 58 return points. Andreeva also controlled rallies from the baseline, committing just a few unforced errors.
Joint began her week with a 7–6(3), 6–4 win over Sofia Kenin. She progressed to the final eight after an injured Alja Tomljanovic was forced to retire while leading 2-0 in the first set. Like Andreeva, Joint has impressed on return and has frequently moved forward, using net approaches to good effect.
The pair have yet to meet on the WTA Tour, and their first encounter promises to be an intriguing contest. Andreeva enters as the favorite due to her experience and recent success, though Joint has shown she is more than capable of causing an upset. The outcome is likely to hinge on serving efficiency and who capitalizes better on return.
Pick: Andreeva in straight sets.
# Emma Navarro vs Diana Shnaider
Emma Navarro has begun her Adelaide campaign on a strong note, defeating Emerson Jones and Yulia Putintseva in straight sets, dropping just 11 games across the two matches. She held serve throughout her most recent outing and was equally effective on return, converting three of four break-point opportunities.
Diana Shnaider opened her tournament with a win over Leylah Fernandez before registering a three-set victory over Katerina Siniakova. The Russian has showcased significant power, producing a high number of winners in both matches, and has also been clinical on return.
Shnaider leads the head-to-head 2–1, though this will be the pair’s first meeting on hard courts. A compelling contest appears likely, with the potential of a win for Shnaider firmly on the table.
Pick: Shnaider to win in three sets.
# Tommy Paul vs Aleksandar Vukic
Pick: Paul to win in three sets.
# Alejandro Davidovich Fokina vs Valentin Vacherot
Pick: Vacherot to win in straight sets.
# Ugo Humbert vs Alexander Shevchenko
Pick: Humbert to win in straight sets.
# Tomas Machac vs Jaume Munar
Pick: Machac to win in straight sets.
# Kimberly Birrell vs Jaqueline Cristian
Pick: Cristian to win in three sets.
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