The struggling conditions in the Safari Rally did not stop Rovanperä, who can now breathe a sigh of relief after today's Power Stage.
Kalle Rovanperä became the first Finnish winner since 2001 in the Safari Rally.
The Finn's lead in the World Cup series before the weekend was 55 points to second, the Frenchman Thierry Neuville.
With today's victory, Rovanperä leads with 65 points.
Strong finish by Solberg
Swedish Oliver Solberg was back in the WRC after a two-month absence.
The 20-year-old made his latest start in the top class in Croatia, where he had to break when the car burned.
Solberg has put himself in a difficult position after two broken rallies and a sixth place in the Swedish Rally.
And before this weekend's competitions, Oliver and map reader Elliott Edmondson were under pressure to finish the car in the classic rally that returned to the World Cup calendar last year.
That time, Oliver was forced to break after rolling the car and breaking the safety cage.
But Solberg and map reader Elliott Edmondson took revenge.
The Swede took the car to the finish line and secured a Swedish point when he came in tenth place.
Welshman Elfyn Evans finished second, 49.9 seconds ahead of Japanese Takamoto Katsuta.