Pele said in an Instagram post that he wished to inspire Brazil's players by sharing a picture taken at the 1958 World Cup in Sweden, when the then-teenager shocked the world by leading the South American side to their first title.
"I'll watch the game from here at the hospital and I'll be rooting for each one of you," Pele said ahead of the crucial match on Monday evening. "We are on this journey together. Good luck to our Brazil!"
Internationally revered as one of the greatest footballers of all time - if not the greatest - Pele had a tumour removed from his colon in September 2021 and has been receiving hospital care on a regular basis.
He was hospitalized last week to re-evaluate his treatment and is also being treated for a respiratory infection, according to medical reports.
Pele played for Brazil and club sides Santos and New York Cosmos as a striker. He helped lead his country to World Cup championships three times - in 1958, 1962 and 1970 - a feat no other player has achieved.
Brazil are seeking to win a record-extending sixth world title.
