Peter Sagan has seen his Tour de France preparations take a hit after testing positive for COVID-19 less than two weeks before the start of the race.

Seven-time Tour de France green jersey winner Sagan was forced to abandon the Tour de Suisse on Saturday due to a third positive coronavirus test in 18 months.

The Slovakian, who holds the record for the most points classification victories in the Tour de France (seven), took to Twitter to announce he had contracted the virus on Sunday.

"Yesterday, Saturday, after the finish of stage seven of the Tour de Suisse, I was given a COVID-19 test by the Team TotalEnergies doctor," he wrote.

"Unfortunately, it came out positive. I have no symptoms, and I feel well but I have to abandon the race. I thank you for your support and I will keep you posted."

Sagan becomes the latest name in a growing list of riders to contract the virus, with INEOS Grenadiers' Tom Pidcock and Bora-Hansgrohe's Aleksandr Vlasov also testing positive for COVID-19.

Vlasov was leading the Tour de Suisse at the time of his withdrawal, while Mikkel Bjerg – team-mate of two-time Tour de France winner Tadej Pogacar – withdrew from the Tour of Slovenia due to coronavirus.

Sagan will hope to recover in time for the start of the Tour de France in Copenhagen on July 1, having ended a 13-month winless drought with his sprint victory at stage three in Grenchen earlier this week.