Paris Saint-Germain forward Neymar is doubtful for Brazil's opening World Cup 2022 qualifier against Bolivia with a back injury.
Footage on social media this week showed Neymar putting his hand on his lower back and keeling on the floor in pain during a training session.
He was unable to train on Thursday and Tite is now preparing to be without his key man for Friday's clash in Sao Paulo, with Flamengo's Everton Ribeiro on standby.
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Brazil's team doctor Rodrigo Lasmar confirmed a decision will be made on Neymar's availability on Friday and Tite added: "We will have to wait and see.