Celtic midfielder Ki Sung Yueng has been given the all-clear following a brain scan.
The South Korea international was admitted to hospital for a number of tests after feeling nauseous in the run-up to his country's World Cup qualifier against the United Arab Emirates.
Ki had already missed the last two Celtic matches with a virus before flying over 5,000 miles back to Seoul ahead of Friday's game.
Celtic wanted the 22-year-old to remain in Glasgow but claim they were told by the South Korean FA that the player had to travel.
Relieved club officials said they were pleased Ki's tests had returned normal results.
A Bhoys statement said: "We made it our priority to ensure he received the appropriate rest and the usual high quality of care and treatment from the Celtic medical staff.
"Unfortunately the South Korean FA demanded that he travel and then, as Ki still felt unwell, they decided to carry out various tests.
"We look forward to Ki's condition improving and to him returning after the international break."