Oscar was rushed to hospital after reportedly collapsing during training with Sao Paulo
The former Chelsea star lost consciousness while doing work on an exercise bike when he started to feel unwell.
Oscar, 34, then fell to the ground and Brazilian media claim he was unconscious for two minutes.
The player was then rushed to the Einstein Hospital Israelita in Sao Paulo, Brazil in an ambulance for further tests.
Medical staff were able to stabilise him as it was discovered he was suffering from cardiac issues.
And the club revealed that Oscar will remain under further observation until the extent of his diagnosis is known.
A statement read: ” During tests carried out on Tuesday morning, at SuperCT, as part of the preparation for the 2026 pre-season, the athlete Oscar presented an incident with cardiological changes, being promptly attended to by the club’s professionals and the medical team from Einstein Hospital Israelita, which was present at the site.
“The player was then taken to the hospital, where he is clinically stable and remains under observation for further tests to clarify the diagnosis.
“As is usual procedure and respecting the player’s privacy, new information will be released as soon as there is an update from the medical team, in agreement with Oscar.”
The Brazilian had an MRI last night and has undergone a diagnostic catheterisation.
Further reports have suggested that Oscar is now considering retiring from football to focus on his recovery.
His current deal with Sao Paulo is due to run until 2027, but it is suggested it could be “amicably terminated”.
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