Legendary Indian footballer PK Banerjee was hospitalised on Tuesday.
The 83-year-old former Indian captain and Padma Shri awardee was admitted to a private hospital in Kolkata.
"He was not talking since yesterday and was sleeping more than he usually does. He underwent a sugar test and we are waiting for the report," a family member said.
"We took him to the hospital for a regular check-up," he added.
According to an official at the hospital, the former Indian football coach was admitted to the general ward and undergoing tests.
The condition of Banerjee, who also has a nerve-related illness, was stable, he said.