This stage was 172km and incorporated climbs at Port de Canto and Alt de Enviny and ultimately Port Aine. Quintana grabbed the lead from Dan Martin after finishing just over a minute behind de Gendt. Martin had started with just a six-second advantage and suffered from a combination of attacks in the closing kilometres.
Stage 4 results
1. Thomas De Gendt (Lotto Soudal) - 4:52:04
CRO Race 2021
2. Nairo Quintana (Movistar) +1'08"
3. Richie Porte (BMC) +1'23"
Current general classification
1. Nairo Quintana (Movistar) - 19:01:43
2. Alberto Contador (Tinkoff) +8"
3. Richie Porte (BMC) +17"
Vuelta a Espanja 2021
Tur Danske 2021