He is to train alongside his other teammates who were involved in the World Cup.
Paulo Dybala, Gonzalo Higuain, Juan Cuadrado, Douglas Costa and Rodrigo Bentancur are all expected to take part in the session led by Aldo Dolcetti.
The rest of the Juventus squad are currently on a preseason tour in the USA.
Ronaldo will train with the entire Juve squad in Turin on August 8 before making his debut in a friendly between the first team and reserves, a traditional Juventus season opener.
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