Many riders have quoted illnesses in the last few weeks in the peloton, specially as both Paris-Nice and Tirreno-Adriatico took place under cold weather last week.
Milano-Sanremo has has many riders miss their presence due to recent sickness and
Sonny Colbrelli is another absence.
The European champion has had a late but strong start to the season with a runner-up spot at Omloop Het Nieuwsblad, however in the following week at the start of Paris-Nice he was already clearly debilitated in the opening stage to Mantes-la-Ville where
Jumbo - Visma took an historical one-two-three win. He didn't take to the start the following day with illness, which has hampered his training and sees him making a meaningful change to his calendar.