Day 4 of the 2025 Stuttgart Open (June 12) will feature second-round action in men’s singles and quarterfinal matches in men’s doubles. In singles, the action will be headlined by top seed Alexander Zverev, who will begin his campaign against Corentin Moutet in the first round.
Meanwhile, in the doubles, all the top four seeded pairs will be in action, including top seeds Kevin Krawietz and Tim Puetz, the second-seeded pair of Sadio Doumbia and Fabien Reboul, and the third-seeded pair of Rohan Bopanna and Sander Gille.
Let’s take a look at some of the matches scheduled to take place on Day 4 at the 2025 Stuttgart Open
Kevin Krawietz/Tim Puetz vs Rajeev Ram/Alex Michelsen

The German team has reached two finals this season, in Adelaide and Munich, but lost to the teams of Simone Bolelli/Andrea Vavassori and Andre Goransson/Sem Verbeek, respectively. At the Stuttgart Open, they began their campaign with a 6-4, 6-2 win over the Italian team of Matteo Arnaldi and Lorenzo Sonego in the first round.
On the other hand, this is the first time Rajeev Ram and Alex Michelsen have teamed up this season. Ram has played with multiple partners this year, with his best result being reaching the final of the ASB Classic with Christian Harrison. However, they had to give a walkover to the team of Nikola Mektic and Michael Venus. In the first round in Stuttgart, the American duo began with a 7-5, 7-6 (4) win over the German team of Yannick Hanfmann and Andreas Mies.
Being the top seeds, the team of Krawietz and Puetz will be the favorites to win the upcoming match.
Predicted winner- Kevin Krawietz/Tim Puetz
Sadio Doumbia/Fabien Reboul vs Francisco Cabral/ Lucas Miedler

The second-seeded French team of Sadio Doumbia and Fabien Reboul will take on the team of Francisco Cabral and Lucas Miedler in the quarterfinals of the 2025 Stuttgart Open.
Doumbia and Reboul are one of the in-form pairs of 2025, having reached three finals, in Acapulco, Rome, and Geneva. They won the title in Geneva with a win over Ariel Behar and Joran Vilegen in the final. In Stuttgart, they began their campaign with a 6-7 (5), 6-3, 10-5 against the team of Sriram Balaji and Miguel Angel Reyes-Varela.
Meanwhile, Francisco Cabral and Lucas Midler have been a successful team in 2025, as the pair came together in the middle of the season and reached four successive Challenger finals, winning titles in the Bordeaux and Madrid Challenger events. They also reached the semifinal at the Geneva Open, losing against the team of Behar and Vilegen. In Stuttgart, they began their campaign with a 6-3, 4-6, 11-9 win over Alexander Erler and Constantin Frantzen.
Being the seeded team, the French pair of Doumbia and Reboul is the favorite for the upcoming match.
Predicted winner- Sadio Doumbia/Fabien Reboul
Alex Michelsen vs Justin Engel

Seventh seed Alex Michelsen will face German wildcard opponent Justin Engel in the second round of the 2025 Stuttgart Open.
Michelsen had his best result of 2025 at Delray Beach, where he lost 6-7 (3), 3-6 against Miomir Kecmanovic in the semi-final. He won a title on the Challenger Tour in Estoril, with a 6-4, 6-4 win over Andrea Pellegrino in the final. The seventh seed began his campaign in Stuttgart with a 6-4, 4-6, 6-3 win over French veteran Gael Monfils in the first round.
Justin Engel has won only one of the three matches he has played on the main Tour in 2025 (before Stuttgart), winning 7-6 (4), 7-6 (4) against Jan-Lennard Struff in the first round of the Hamburg Open. The German has won an ITF event in Cadolzburg, winning 7-6 (2), 6-3 against Hamish Stewart in the final. In Stuttgart, he began his campaign with a 4-6, 6-4, 7-6 (5) win over James Duckworth in the first round.
These two players have not played each other previously, but current form makes Michelsen the clear favorite to win the match.
Predicted winner- Alex Michelsen