Real Madrid B boss Santiago Solari is reportedly being lined up to replace Lopetegui at the Bernabeu, and senior players believe he is not yet ready to take on a job of such magnitude.
A potential swap deal for the pair was apparently ion the cards in the summer.
But both stayed put, while Marcelo has previously stated his desire to stay in Spain.
“I am very happy at Madrid. People know what my situation is,” he said.
Real Madrid's Marcelo is reported to be keen on a move to Juventus (Image: GETTY)
“I have a lot of years left on my contract, I am very happy here. For me it is the best club in the world.”
However, the 30-year-old has since seen Real slump to seventh in the La Liga table after nine games - four points behind leaders and bitter rivals Barcelona.
And the excellent on-field relationship he had with Ronaldo when the pair were Real team-mates might have changed his mind.
Marcelo could link up with former Real team-mate Cristiano Ronaldo in Italy (Image: GETTY)
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Juve could sell Alex Sandro to fund the deal according to reports (Image: GETTY)
Before Ronaldo left, they four Champions Leagues together, three La Liga titles and the Copa del Rey on two occasions.
Meanwhile, Sandro, 27, has been a key figure alongside Ronaldo for Juventus this season
The Old Lady have started the season unbeaten, with eight wins and one draw in Serie A so far in 2018-19