Team Sky rider Sergio Henao has returned to Europe following a six-week investigation into anomalous doping test results in his native Colombia.
Henao was removed from the British squad’s race programme in March after staff expressed concern over readings he gave in doping controls taken in South America over the winter.
Team Sky alerted the International Cycling Union (UCI) to the results and Henao subsequently flew back to his homeland to take part in a “high-altitude research programme”, which was carried out by independent experts and designed to explain the discrepancies.
The 26-year-old will now undergo further testing at sea level in Nice, before the researchers produce a report.
A Team Sky statement said: “Within the next two weeks, the independent experts will conclude their analysis and produce a final report. The team will then determine the right steps to take.
“Team Sky will also make all data and findings from the research programme available to WADA [the World Anti-Doping Agency], the UCI and CADF [Cycling Anti-Doping Foundation].
"No decisions will be taken until the scientific research is completed and has been properly assessed. A full update will be given at that time."
Henao has raced only once this season, at the Tour of Oman in February, but could make his comeback within two weeks should he be cleared of any wrongdoing.
The statement added: “To prepare for any potential return to racing, provisional entries have been made for Sergio - as a reserve - at the Criterium du Dauphine [June 8-15] and the Tour de Suisse [June 14-22].”