In 2019 Dürksen made his single-seater debut, racing for Mücke Motorsport in the Formula 4 UAE Championship alongside Nico Göhler.[2] He scored his first victory at the first round of the championship at the Dubai Autodrome and won four more races over the course of the campaign. The Paraguayan lost out on the title to Matteo Nannini, finishing 68 points behind his rival.[3][4]
Dürksen then competed in both the Italian and ADAC Formula 4 championships.[5] Staying on with Mücke Motorsport in Italy and its German offshoot ADAC Berlin-Brandenburg in ADAC F4, the Paraguayan won a race at Vallelunga and finished eighth and eleventh in the championships respectively.[6]
2020
The following year Dürksen returned to the ADAC Formula 4 Championship on a full-time basis, whilst also racing in three rounds of Italian F4.[7] He won two races in ADAC F4, those being the final race at the first Nürburgring round and the following race at the Hockenheimring, leading to him finishing sixth in the drivers' standings, with six podiums and 191 points. In the Italian championship Dürksen won a race in Austria and placed 13th in the end results.[8]
2021
The Paraguayan returned to the Italian F4 Championship with BWT Mücke Motorsport in 2019 for his final season in Formula 4. He improved to sixth in the final standings and won two races at the Mugello round.[9][10][11]
Dürksen drove for PHM Racing during the 2023 Formula 3 post-season test in Imola.[20]
FIA Formula 2 Championship
2024
In November 2023, it was announced that Dürksen would drive in the 2024 FIA Formula 2 Championship for PHM AIX Racing, partnering FIA Formula 3 graduate Taylor Barnard.[21] Dürksen claimed the first points and podium for a Paraguayan driver in any international Formula 2 category, with a third-place finish in the Feature Race at the fourth round of the season at Imola.[22] He scored a second podium finish, this time in the Sprint Race held at Monza, where he finished again in the third position.
One round after, in the Azerbaijan GP, Dürksen managed to score his maiden Formula 2 win. In the Saturday Sprint Race, he started 4th on the grid and was able to convert it into his first ever victory in the championship. This is the first ever victory for a Paraguayan driver in any international Formula 2 category.