The Serbian, who also branded his team as "clueless", has come under pressure of late as Los Che lie 10th in La Liga following a poor start to the campaign.
"There is sadness after losing a match like that, it hurts us," the 47-year-old told reporters.
"Currently the team is very weak. We've had opportunities, but psychologically we look like a sinking team. We seem clueless.
"When you come to a new team there is always the possibility that you could do things wrong, but I am a professional and I will try to put things right."
A trip to Getafe awaits Valencia on Saturday.