They are in the bottom three in the Premier League, which is an unusual position considering their form last season.
But Nuno thinks they must take things one game at a time in order to find their groove.
"It's the third season for us. We started in the Championship, Thursday we play Europa League, we are the same," said Nuno to reporters.
"We have to work hard, but we don't stay too much time in the past, we just look at Thursday.
"This is my job. It's not when we win everything is OK, when we lose everything is bad.
"That's why I say we have to realise what happened."