Both initially struggled to match the locals on the fast, narrow and bumpy roads, but two top-three stage times for Lappi have brought the Finn up to fifth and into Roman Kresta and Jaromir Tarabus's battle for third.
Wiegand has found it harder to get up to speed and is currently seventh.
Leading positions after SS4:Pos Driver Team/Car Time/Gap 1. Jan Kopecky Skoda 30m50.3s 2. Vaclav Pech Invelt Mini +18.8s 3. Roman Kresta Adell Mogul Skoda +22.8s 4. Jaromir Tarabus AK Skoda +24.3s 5. Esapekka Lappi Skoda +27.6s 6. Tomas Kostka Rufa Ford +41.1s 7. Sepp Wiegand Skoda +46.9s 8. Pavel Valousek Delimax Ford +59.3s 9. Antonin Tlustak GPD Skoda +1m42.4s 10. Germain Bonnefis Renault +2m28.5s
The fifth Intercontinental Rally Challenge was the best yet, and it was Skoda UK driver Andreas Mikkelsen who emerged as champion from a tense five-way shootout at the season finale. Matt Beer reviews the season