Claudio Imhoff is the first rider to start at 12.17 local time (CEST).
12.47 Josef Cerny
12.50 Stefan Bissegger
12.57 Filippo Ganna
12.58 Jan Tratnik
13.21 Rémi Cavagna
13.38 Stefan Küng
13.05 Jos van Emden
14.02 Steven Kruijswijk
14.04 Rohan Dennis
14.08 Sepp Kuss
14.20 Thymen Arensman
14.22 Wilco Kelderman
14.24 Damiano Caruso
14.26 Lucas Hamilton
14.28 Ion Izagirre
14.30 Fausto Masnada
14.32 Richie Porte
14.34 Marc Soler
14.36 Ben O’Connor
14.38 Geraint Thomas
14.40 Michael Woods
Another interesting read: prologue route 2021 Tour de Romandie.