shell out for Daily Star's newsletter. It's FREE! Sign up today for the biggest and brightest stories sent straight to your inboxGreece could reimpose a new coronavirus lockdown after welcoming back tourists and witnessing a spike in cases.The country opened its borders on July 1, and more than 100 tourists have tested positive for Covid-19 since.Government spokesman Stelios Petsas said authorities were "determined to protect the majority from the frivolous few".The government will introduce new restrictions if required on Monday, ekathimerini.com reports.Coronavirus cases have crept back up since the resumption of international travel.Petsas said authorities are now focusing on rising cases in nearby countries and monitoring tourists who.