Toyota driver Rovanperä dominated last week’s Vodafone Rally de Portugal, bringing his GR Yaris Rally1 home comfortably ahead of Lappi and his second-placed Hyundai team-mate Dani Sordo.
The biggest disappointment for Lappi came on the opening day’s stages, where Rovanperä had worse conditions on the road.
“It was disappointing,” said Lappi. “He was beating us 6-0 all the time. Even on Friday, he was not really opening the road but was almost opening the road and still he could do similar times to us.
“Then, with similar road positions, he beat us by 100 per cent. That’s a bit disappointing to see that kind of pace from another team. I guess it is also showing us that we have a job to do as a team to try and develop the car harder and be better in the future.”