Spanish compatriots Carlos Alcaraz and Jaume Munar clash in the semifinals at ATP Tokyo on October 5 with first serve scheduled for 3:00 am ET. World No. 3 Alcaraz enters as the overwhelming favorite against the 64th-ranked Munar.

Can Munar leverage his tactical success from their previous meetings to neutralize Alcaraz’s baseline power? I am bypassing the heavily-juiced moneyline to identify value in the secondary markets, specifically focusing on how deep this stylistic clash will go.

Alcaraz has the stronger overall profile, but Munar arrives with enough recent hard-court success to make the secondary markets more interesting than the moneyline. He has also been competitive in the bulk of their four previous encounters, winning one and force two others (including the most recent) to a third set.

The 3-1 head-to-head record gives Alcaraz the clear edge, although three of the four meetings lasted at least 23 games. Munar has also won five straight matches, including an impressive three-set upset over Taylor Fritz in the first round (after two qualifying wins).

That recent form supports the thesis that Munar can keep this competitive, even against a substantially stronger opponent.

The underlying numbers point firmly toward Alcaraz as the likely winner. Tennis Abstract’s September 28 Elo ratings place Alcaraz at 2,148.9 overall and 2,079.8 on hard courts, compared with Munar at 1,766.7 and 1,748.0, while Tennis Ratio’s 52-week comparison gives Alcaraz the advantage in dominance ratio (1.892 to 1.135), return games won (29.9% to 23.0%), and tiebreak win rate (57.1% to 31.6%). Those figures make a Munar upset difficult to justify, but his recent hard-court run and history of extending this matchup leave room for a competitive scoreline.

The total is playable, but the case is more nuanced than a claim that both previous meetings cleared this number. Three of the four head-to-head matches did so: the 2025 Queen’s Club thriller produced 35 games, while the 2022 Rio and 2021 Marbella meetings each totaled 23. Only Alcaraz’s 6-3, 6-3 Barcelona win stayed below the line.

Munar’s recent Tokyo wins over Fritz and qualifying opponents show that he can absorb pace and extend rallies on hard courts. Alcaraz, meanwhile, has already played a three-setter against Alex Michelsen in this tournament. The data-driven gap favors Alcaraz, so a routine straight-sets win is a real danger to the over, but 20 games can be reached by a 6-4, 6-4 result. At -104, Over 19.5 remains the preferred value angle, albeit with less margin than the moneyline.