Wolves fans raised £7,500 in two hours for a giant flag for the 29 year old Mexican in the Steve Bull Stand at Molineux.
In addition, thousands of messages of support for the player have been received by the club.
"I am not surprised about the reaction," said Nuno. "Raul means a lot to this city.
"All the things you can say about Raul is not enough because he is an amazing person."