In 2020, Laursen made his single-seater debut, competing in the F4 Danish Championship with FSP Racing.[2] He started the campaign off strongly, taking a triple of podiums, which included his maiden win in car racing, at Jyllandsringen. The same results followed at Padborg Park, where the Dane once again finished second, third and first in the races. Having taken a sole podium in the third event, Laursen was declared as champion following the cancellation of the season finale, scheduled to take place at Sturup Raceway.[3]
2021
The Dane progressed to the Italian F4 Championship the following year, driving for Prema Powerteam.[4] Starting his year by finishing fifth in the season opener at Le Castellet, Laursen struggled the following round in Misano, being forced to retire from two races. Consistent points would come at Vallelunga and Imola, before the Dane went without a points finish at the Red Bull Ring. Having scored a pair of top-ten results as well as a fastest lap at Monza, Laursen finished ninth in the overall championship, whilst losing out narrowly on the rookie title to Nikita Bedrin owing to a spin in the final race.[5]
2022
Having started 2022 by racing in two events of the F4 UAE Championship, where he scored a pair of podiums,[6] Laursen returned to the Italian and ADAC F4 series for his main campaign, once again competing with Prema.[7][8][9] His season in the former began slowly, with the first two rounds yielding a mere three points finishes, before the Dane scored his first podium in the series, finishing second in Race 3 at Spa.[10][11] Another podium would follow at the Red Bull Ring, however that round would see Laursen's final points finish of the campaign, which meant that he classified 11th in the standings. In the German championship, Laursen scored a podium during the opening round, having come back from a 19th-placed grid slot during race 3,[12] before struggling to achieve major results at the Hockenheimring, notably dropping to ninth from reverse-grid pole in the final race.[13] Laursen bounced back at Zandvoort, where, having taken third place in race 1, he held off teammate Andrea Kimi Antonelli to take his first victory in the championship on Sunday by less than a tenth of a second.[14][15] Despite leaving the series after round four, where he made another appearance on the rostrum,[16] Laursen ended up sixth in the drivers' standings.[17]
For the 2023 season, Laursen switched to sportscar racing on a full-time basis, teaming up with his father Johnny and fellow Dane Nicklas Nielsen in the Asian Le Mans Series at the start of the year, before racing with the same teammates in the European Le Mans Series during the summer, driving for AF Corse-entered Formula Racing in the GT category of both championships.[19][20] Having scored two second places in the ELMS, the Laursens classified seventh in the standings.
2024: First ELMS win
The Dane remained with Formula Racing in the ELMS, once again joining father Johnny and Nielsen at Formula Racing.[21] During the opening round at Barcelona, Laursen and his teammates profited from an issue for the dominant Iron Dames entry to inherit the win and take the team's first win in the series since 2015, as well as Laursen's first ever sportscar victory.[22][23]