Constantin Frantzen and Robin Haase Fall Short in Cincinnati Open Doubles Final

From Alternate Entry to Masters-1000 Finalists

Frantzen and Haase entered the tournament field as an alternate team, seizing an unexpected opportunity that quickly blossomed into a deep tournament run. To kick off their campaign at the ATP Masters 1000 event, the duo defeated Lucas Miedler and Marc Polmans in straight sets, 6-4, 7-6, as detailed by Augsburg Journal. That opening win set the tone for a week defined by resilience under pressure.

In the second round, the deutsch-niederländische duo faced Rajeev Ram and Joe Salisbury, widely recognized as one of the most successful doubles pairings of recent years. Frantzen and Haase dropped the second set but claimed the match tiebreak to secure a 7-6, 3-6, 10-4 victory. Their momentum continued in the quarterfinals, where they edged past Théo Arribagé and Albano Olivetti by winning consecutive tiebreaks, according to Augsburg Journal coverage.

Overcoming Top Seeds on the Way to the Title Match

The biggest test of their week came in the semifinals, where Frantzen and Haase squared off against the tournament’s second-seeded team, Marcel Granollers and Horacio Zeballos. The pair delivered a sharp performance, winning 6-3, 3-6, 10-5 to punch their ticket to the championship match. For the 28-year-old Frantzen—who grew up in Augsburg and attended the Robert-Bosch-Fachoberschule—the result marked the first Masters-1000 final appearance of his career and a new milestone following previous career highlights that included reaching No. 34 in the ATP doubles rankings.

According to Augsburg Journal, Frantzen and Haase previously captured their first tour-level title together in September 2025 in Chengdu, alongside reaching earlier-season finals in Montpellier and Rio de Janeiro. Their Cincinnati run elevated them into the final stage of a tournament category positioned directly below the four Grand Slam championships.

Championship Clash Against In-Form Brazilians

In Sunday’s final on the P&G Stadium Court, Frantzen and Haase met Orlando Luz and Rafael Matos. The Brazilian pair arrived in Cincinnati riding a wave of momentum after winning the Masters tournament in Montreal just days prior. Luz and Matos advanced to the Cincinnati title match with a three-set semifinal victory over Hugo Nys and Edouard Roger-Vasselin, winning 6-4, 2-6, 10-2 to stretch their winning streak to nine consecutive matches.

Coverage from RP Online confirmed that Frantzen ultimately fell short in the championship showdown, finishing as the tournament runner-up alongside Haase. The match was broadcast via Sky and streamed on Wow, rounding out a packed week of high-level tennis in Ohio.