Former Chelsea star Oscar could be forced to retire after falling unconscious during a training session - with tests at the hospital uncovering that he has a heart problem, according to reports.
The attacking midfielder is believed to have suddenly taken ill while testing an exercise bike during a training session with Brazilian Serie A side Sao Paulo on Tuesday.
The 34-year-old, who spent five years at Stamford Bridge before making a £60million move to Shangai Port in 2016, returned to his boyhood club last December but has played just 21 games for them.