The Round of 64 at the Shanghai Rolex Masters brings a loaded slate of action on the hard courts in Shanghai, with five seeded stars among the world's top six all taking to the court. Notably, the head-to-head history across these matchups throws up some genuine talking points, as more than one highly ranked player steps in having previously lost to their current opponent.

Juan Manuel Cerundolo vs. Carlos Alcaraz - Round of 64

Alcaraz enters as the world No. 2 and holds a 1-0 head-to-head advantage over Cerundolo, who is ranked 45th. Their only prior meeting came at the Next Gen ATP Finals in Milan, where Alcaraz won a competitive match-tiebreak encounter by a score of 4-0, 4-1, 2-4, 4-3(3). That result suggests Cerundolo pushed Alcaraz in the latter stages, winning the third set and taking the fourth to a match tiebreak. Still, Alcaraz closed it out, and the ranking gap of 43 places underlines his status as a heavy favorite. With no odds provided and no scheduled time listed, the matchup speaks for itself on paper.

Prediction: Alcaraz in three sets.

Alexander Zverev vs. Yibing Wu - Round of 64

Zverev, ranked third in the world, owns a 1-0 record over Wu, who sits at No. 101. Their one meeting came in the Quarterfinal of the Gonet Geneva Open in Geneva, where Zverev won 4-1 before Wu retired. A retirement-shortened result leaves some uncertainty about what a full match might look like, but the ranking differential is substantial, and Zverev's pedigree at the Masters 1000 level far exceeds Wu's at this stage. Wu will need to be at his best physically and tactically to cause an upset on the Shanghai hard courts.

Prediction: Zverev in straight sets.

Camilo Ugo Carabelli vs. Felix Auger Aliassime - Round of 64

FAA, ranked fourth in the world, holds a 1-0 head-to-head lead over Ugo Carabelli, ranked 57th. Their lone meeting came in Round 2 of the French Open in Paris, where Auger Aliassime was dominant, winning 6-0, 6-3, 6-4 in straight sets. That was a one-sided contest on clay, and while this match is now on hard courts in Shanghai, the ranking gap of 53 places and the clinical nature of that prior victory both point firmly toward Auger Aliassime. Ugo Carabelli will need to find a very different level to compete.

Prediction: Auger Aliassime in straight sets.

Ben Shelton vs. Daniel Altmaier - Round of 64

This matchup carries an intriguing twist: Altmaier, ranked 85th, actually leads Shelton 1-0 in their head-to-head. Their only meeting came in Round 2 of the Hamburg Open, where Altmaier won 4-6, 7-6(4), 6-4, recovering from a first-set loss to take the match. That result on clay shows Altmaier can absorb pressure and grind out wins in tight situations against higher-ranked opponents. Shelton is ranked fifth in the world and is the clear favorite by reputation and ranking, but Altmaier's prior result will give him genuine confidence heading into this Round of 64 encounter on hard courts.

Prediction: Shelton in three sets.

Alex De Minaur vs. Alex Molcan - Round of 64

Perhaps the most striking head-to-head on today's slate: Molcan, ranked 102nd, leads De Minaur 1-0. Their only prior meeting came in the Semifinal of the Open Parc in Lyon, where Molcan won convincingly, 7-6(2), 6-2. That score, with Molcan dominating the second set and winning the first-set tiebreak decisively, suggests it was not especially close despite the surface difference from today's hard court. De Minaur is ranked sixth in the world and will be eager to avenge that defeat, but Molcan enters knowing he has already beaten the Australian at this level.

Prediction: De Minaur in three sets.