Saliba is on a straight loan at OM after being convinced about the move by president Pablo Longoria.
Longoria has since declared a wish to open talks with Arsenal about a permanent deal.
And Saliba revealed: "Longoria told me that if I wanted to take a step forward in my progress, I had to come to Marseille.
"He said it's because if you manage to be good at OM in the face of this pressure, you can be good everywhere."
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