The following Formula 4 UAE season, Weerts was crowned series champion, sweeping the final quadruple-header round at Dubai Autodrome en route to a 50-point points lead over second-placed David Schumacher.

2019 saw Weerts explore a new discipline of motorsport, joining Belgian Audi Club Team WRT for the 2019 Blancpain GT Series Endurance Cup campaign.

[12] He began the team's title defense on a high note, taking pole for the opening race of the weekend at Magny-Cours,[13] before going on to win Saturday's event, further adding a podium finish the following afternoon.

Weerts stated his ambitions to remain on top in the Sprint Cup, but argued that the change in machinery for 2023 ensured that the team's efforts to score a fourth consecutive title wouldn't be easy.

[21] The year began with two mistakes from Weerts, who first crashed with a lapped car at the Bathurst 12 Hours and then retired from the opening Endurance Cup event as a result of a collision with Alessio Rovera.

[22][23] He redeemed himself in the first pair of Sprint Cup rounds, winning at Brands Hatch due to a strong pit stop as well as taking pole and victory in race 2 of the Misano weekend.