Valencia coach Nuno was barracked by home fans during their 3-0 win over Levante.
Los Che fans are upset with the way Alvaro Negredo is being treated.
“I've already explained the Negredo case from my perspective. No-one has a bigger interest than me to see Álvaro come back to help us. We want him back. The numbers that we're seeing aren't adequate. Many people don't see what I see, it's my job to analyze players and the options available to us," said Nuno.
“What I'm going to do is go to work tomorrow. We've now had a number of games in the Liga without losing. If we hadn't drawn those two games at home (against Deportivo and Betis) we'd be in a different situation. I understand the fans. It hurts on a personal level, no-one likes listening to that, but I'm convinced that it's going to change"