Ruiz is set to sign on-loan with PSV Eindhoven.
"I wouldn't call his signing a mistake because at that time it was probably for Fulham the right choice and the right investment," Meulensteen said.
"Don't get me wrong, he is a very good player. I've come in, I've looked at the squad, worked with these players, I've picked my teams on what I think are the right reasons and motivations, but I can also understand Bryan's point of view."
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