However, they lost 2-0 against Southampton before the international break.
"We knew that especially our first three games were very difficult on paper - but then we played the worst in our fourth game," said Bilic.
"We have to accept that every game, whoever we play against, we enter that game as a big, massive challenge and test for us.
"We have to think positive, of course thinking brave, not being scared of them, no, but knowing that we will have to out-run them, out-focus them, that we have to be better than them in those things that you can influence.
"Every game is like that, every game. We can't pick games where we are going to be on fire and those games we are not going to be on fire."