Matteo Berrettini vs Daniel Adolfo Vallejo Prediction — Tokyo, Friday, October 2, 2026

The model's Matteo Berrettini vs Daniel Adolfo Vallejo prediction for Friday night's Tokyo ATP second-round match lands on Berrettini, but the card calls this one a pass, not a play.

That split is worth sitting with before the first ball goes up at 9:00 PM ET. Berrettini's serve is the better weapon on paper. Vallejo's game is built to blunt exactly that weapon, and he has shown up to Tokyo playing the best tennis of his year. The model picked a side anyway, then declined to back it with money.

Why the model leans Berrettini

Strip away the recent scorelines and this still comes down to Berrettini's first strike. His first-strike index sits at 0.88, with aces landing on 11.3% of his service points, the kind of free-points profile most players on tour can't match. Vallejo, by contrast, has held just 71% of his service games on hard courts over the past 12 months, a mark that gives Berrettini's serve real margin to work with before a rally even starts.

Put another way, Vallejo has to win extended points to stay competitive because he isn't winning enough free ones on serve. Against a server like Berrettini, that's the hard way to build a set.

The Navone problem

The case against isn't about Vallejo's ranking, it's about his style. He's a steady, deep-returning grinder who has won 52% of second-serve return points over the past 12 months, and that profile is exactly what dragged Berrettini into trouble against Navone, a similar grinder who beat him twice on hard courts in August and September. Berrettini is only 5-4 against grinders on hard over that stretch, and Vallejo fits the description the model is worried about.

There's also the rust question. Berrettini's only match since a 29-day layoff was his three-set win over Alejandro Davidovich Fokina in Tokyo, and it opened with a 1-6 first set. He won just 69% of his first-serve points in that match, below his usual 76.5% level, and held only 11 of 14 service games. He recovered to win, but a slow start like that against a return-first grinder is the exact scenario the model flagged as a risk here.

Vallejo's heavy month cuts both ways

Vallejo arrives hot, 4-1 across his last five matches, all on hard courts, including a 6-1 6-3 win over the No. 4 seed in Tokyo's opening round. His serve has genuinely improved: he's won roughly 65% of service points in the matches with full stats, above his 61% mark over the past 12 months, and he's held around 90% of his service games across his last four matches. That narrows the serve gap with Berrettini. It doesn't close it.

It also comes with mileage. In the two weeks before Tokyo, Vallejo played Davis Cup in Lima on clay, a different surface that speaks to his durability rather than his form here, needing treatment on his right hamstring during a three-set loss before coming back the next day to win a doubles match and a singles match. Counting everything, that's six singles matches and a doubles match in 14 days, with travel from Lima to Hangzhou to Tokyo in between. His best win of the stretch came against a Tokyo opponent who was reportedly worn down from his own travel, and when he ran into two bigger servers in Hangzhou, his return did little: Coleman Wong and Jaime Faria largely neutralized it across those matches.

The verdict

Add it up, and the model's call is Berrettini, with Vallejo's hot stretch narrowing the gap but not flipping it. That's the side it's on. It is not a bet. This one is an official PASS: no market line being quoted and no play going on the board for Friday, October 2's 9:00 PM ET first ball.