Italy's Lorenzo Gagli and Edoardo Molinari have been reinstated in the Oman Open field after Gagli tested negative for the coronavirus.
Both players had withdrawn from the European Tour event in Muscat on medical grounds. Gagli was tested for the virus and room-mate Molinari was moved to another hotel room.
A statement from the European Tour read: "On Wednesday, Lorenzo Gagli and Edoardo Molinari withdrew from the Oman Open on medical grounds.
"Gagli exhibited flu-like symptoms and was assessed by the tournament's on-site medical team.
"In consultation with the Omani Ministry of Health, and in line with current World Health Organisation guidelines, he was subsequently tested for coronavirus (Covid-19) and immediately entered self-isolation as a precaution.
"Gagli had been sharing a hotel room with Edoardo Molinari, who showed no signs of illness, but as a further precaution he also entered self-isolation in a separate room.
"On Thursday morning, the Omani Ministry of Health reported that Gagli's test results were negative.
"Due to these exceptional circumstances, both Lorenzo and Edoardo will now be reinstated into the Oman Open as an addition to the field, meaning the field size will now be 146. They will tee off together at 1.30pm local time."
European Tour chief executive Keith Pelley added: "This is a difficult global situation, one during which we will continue to follow all guidance given to us on preventive measures, and all decisions will continue to be made in the interests of overall public health.
"We will also continue to work closely with our own health experts and local authorities to ensure we have the latest medical and travel advice for all our tournaments, because the well-being of our players, staff and spectators remains the European Tour's absolute priority."