Coronavirus is threatening to cause trouble at the Tour de France ahead of Saturday’s start. The disease played havoc with the world’s top cycling race in 2020 and 2021 before abating, but a surge in cases among this year’s teams means some old protocols are being brought back. Superstar Tadej Pogacar caught Covid-19 during his preparation but symptoms were mild. Belgian time trial world champion Remco Evenepoel has decided to wear a mask and in the team of Danish defending champion Jonas Vingegaard, PCR tests and hand disinfection are once again part of standard procedures in addition to mask…