World Rally Championship promoter Simon Long wants to see more drivers crossing over from Formula 1 in the wake of the major impact Kimi Raikkonen made on last week's Rally Finland.
Long said both sports benefit from drivers switching discipline, pointing to the level of interest in Sebastien Loeb's Red Bull test last December and his potential F1 race debut with Toro Rosso at the end of this year.
"I think it's fantastic to see so much Formula 1 interest in the WRC," said Long. "We've got two motorsport series at the very top of the world, and drivers in both categories like to believe they're the world's best when get behind the wheel.
"To have Sebastien [Loeb] testing his mettle against the best in [Formula 1] in Abu Dhabi later this year and vice-versa in Finland [with Raikkonen] is a really good example of the box office draw of the two championships - and this battle for supremacy in terms of who is the world's greatest driver and what is the world's greatest test of man and machine.
"I like this jostling in the hierarchy for who's the best. There are a lot of synergies between the driver mentality in F1 and what we see here in WRC: aggression, real expertise and the belief from those drivers that they are world's best - long may that battle continue."