Winks has been linked with a loan move to Valencia, but Mourinho has attempted to end the speculation today.
"What do I have to say to stop with this talk? I said already that he's going nowhere," he said.
"When I say he's going nowhere, what more do you want me to say?
"He played the last matches. He didn't play the last one because it was a chance to let players like Gedson (Fernandes) get minutes.
"Tomorrow he's selected again. If someone's talking to other clubs I'd say don't waste your time."