Sam Querry has fled Russia on a private jet after he and his family tested positive for coronavirus.The US tennis star dropped out of the St Petersburg Open after they received their positive test results on Sunday.Querrey left the country with his wife Abby Dixon and their eight-month-old son Ford on Tuesday in what ATP are calling a ‘serious breach of protocol’.The test results came before the 49th ranked in the world tennis player’s match against second-seeded Denis Shapovalov in the first round of the main draw. Share this article Share In a statement, the tournament said Querrey did not open the door to doctors who came to examine the family on Monday, saying his baby son was sleeping, and the family then left the hotel before a second scheduled examination the next day.The tournament said: ‘Sam Querrey, as the hotel’s security cameras identified, left the hotel together with his family at 5.45am on October 13 without informing the reception service. ‘As Querrey told an ATP representative, he left Russia with his family on a private plane.’He and his family were instructed to quarantine for 14 days in their five-star Four Seasons Hotel. But they were then told they would be visited by a doctor and could be forced to stay in hospital if they were found to have symptoms. Fearing they could be separated from their son in a foreign country due to their mild symptoms, Querrey and Dixon reportedly ordered a private jet to whisk them out of Russia.They are now staying in an unknown ‘nearby European country’ according to freelance journalist Ben Rothenberg.The family sat at the back of the jet to avoid exposing the pilots to the virus and are now staying in an AirBnB.In an email to players and members, the ATP said: ‘The ATP is aware of an incident regarding a player’s serious breach of protocol relating to COVID-19 at this week’s St. Petersburg Open.’Adhering to health and safety protocols is critical to ensure events take place safely within the guidelines established by local authorities. ‘Players and their support team members are reminded that breaches of protocol can jeopardise an event’s ability to operate and have repercussions on the rest of the Tour.’In accordance with ATP’s Code of Conduct, we are taking this matter extremely seriously and an investigation is underway.’Querrey is entered in further events in the rest of the 2020 ATP Calendar, including the Paris-Bercy Masters beginning on October 31.If the ATP deems the breach of protocol a ‘serious offence’ after its investigation, Querrey could be fined up to $100,000 and/or suspended from the ATP for up to three years.There was no immediate comment from a spokesperson for Querrey.