On Day 4 of the 2026 Rio Open, eight players will compete in the remaining second-round matches, striving to secure spots in the quarterfinals of this ATP 500 clay-court tournament held in Rio de Janeiro. Among these contests, Matteo Berrettini will face Dusan Lajovic, aiming to advance further. Berrettini returns to Rio for the first time since 2022, when he was the top seed, seeking to reach his second quarterfinal at this event.
Key Matches and Players to Watch for Quarterfinal Spots
Joao Fonseca, the tournament’s third seed and a local favorite, is attempting to make history by becoming the first home singles champion at the Rio Open. He will challenge Peru’s Ignacio Buse, who has shown promise. Meanwhile, Argentine eighth seed Tomas Martin Etcheverry, who holds a balanced 2-2 main-draw record in Rio, will battle Lithuanian qualifier Vilius Gaubas for a quarterfinal place.
Two European players, Bosnia’s Damir Dzumhur and Portugal’s Jaime Faria, will engage in an all-European duel as both pursue their first ATP singles quarterfinal of the 2026 season. Their match promises an intriguing contest between emerging talents determined to make an impact in the clay-court tournament.
Anticipated Singles Encounters on Day 4
Berrettini and Lajovic Face Off in First Career Meeting
Matteo Berrettini and Dusan Lajovic will meet for the first time in their careers, with the victor moving on to play either Joao Fonseca or Ignacio Buse in the quarterfinals. Both players entered the tournament confidently, having won their opening matches in straight sets. Berrettini defeated Tomas Barrios Vera 7-6(1), 7-5, while Lajovic overcame seventh seed Daniel Altmaier 6-4, 7-6(7).
Berrettini has claimed victory in two of his three matches during the 2026 season so far, whereas Lajovic has won one out of two main-draw matches. Despite fluctuations in form over recent years, Berrettini’s relatively stronger performance in the past year and a quarter suggests he is favored to win without significant difficulty.
Predicted Outcome: Berrettini to win in straight sets.
Etcheverry Seeks Improvement Against Gaubas
Argentine Tomas Martin Etcheverry is determined to enhance his Rio Open record as he takes on Lithuania’s Vilius Gaubas. The winner will go on to face either Damir Dzumhur or Jaime Faria. Both players earned tough victories in the first round; Etcheverry defeated countryman Francisco Comesana 3-6, 6-3, 6-4, and Gaubas bested Brazilian wildcard Luis Augusto Miguel 6-3, 2-6, 6-2.
Despite Etcheverry’s previous mixed results at Rio, his greater experience on clay should give him an edge over the younger qualifier. This match will test whether Etcheverry can break his uneven pattern at this tournament.
Predicted Outcome: Etcheverry to win in straight sets.
Dzumhur and Faria Battle for Breakthrough Quarterfinal Spot
Bosnian Damir Dzumhur and Portuguese lucky loser Jaime Faria will compete in their inaugural meeting, with the winner facing either Etcheverry or Gaubas. Dzumhur edged Pedro Martinez in a grueling three-setter 0-6, 7-6(5), 6-4, while Faria recorded a dominant 7-5, 6-1 victory over the two-time defending champion Sebastian Baez.
Both players have secured two wins so far this season, but their recent form diverges. Dzumhur’s disappointing results contrast with Faria, whose only loss this year occurred at the Australian Open against Andrey Rublev. Although Dzumhur holds a higher ranking, Faria’s momentum gives him a solid chance to advance.
Predicted Outcome: Faria to win in three sets.
Joao Fonseca Aims for Historic Home Victory Against Buse
Local favorite Joao Fonseca will confront Ignacio Buse of Peru, both eager to progress in front of the home crowd. Fonseca is anticipated to leverage his seed status and home advantage to secure a straight-sets triumph and move deeper into the tournament.
Predicted Outcome: Fonseca to win in straight sets.
The Stakes and Future Implications for Rio Open 2026
The outcomes of these second-round matches will significantly shape the Rio Open’s quarterfinal lineup, heightening the competition’s intensity for players seeking to make their mark early in the season. Matteo Berrettini’s pursuit to dethrone Dusan Lajovic underscores the struggle between established contenders and challengers aiming for clay-court success. Likewise, rising talents such as Jaime Faria and Joao Fonseca carry the hopes of breaking through on this ATP 500 stage.
The tournament’s progression will offer valuable momentum for winners as the ATP Tour advances, and players who capitalize on these opportunities could build confidence for the remainder of the 2026 clay season. Fans should watch closely as these closely contested matches unfold, with the potential for surprising upsets and breakthrough performances.
