ATP Announces Updated ATP Challenger Tour Calendar, ATP to Monitor Ongoing Situation Related to Coronavirus From the ATP Tour (March 3, 2020) The ATP announced today an updated 2020 ATP Challenger Tour calendar, following the cancellation or postponement of additional events due to continuing concerns over the outbreak of the Coronavirus. The following events have been … [Read more...] about ATP Announces Updated ATP Challenger Tour Calendar, ATP to Monitor Ongoing Situation Related to Coronavirus