"We haven't been ourselves of late, that's true. The results haven't been good and the performances could have been better," the Liverpool skipper told the club's official website.
"We're going through a dip in form which all top teams do at some stage and we just have to make sure we play our way through it. We're not performing to the standards we can do but that will change.
"I'm asking the fans to trust me when I say there's no crisis here. We have fantastic players and a world class manager and we will get things right again, there's no doubt about that.
"We've got an international break now which will give Rafa the chance to look at things and work with the players who are staying behind. For those of us going away, we have to get the jobs done with our countries and then come back ready for a massive match at Everton.
"If we can turn in a performance in the derby and win the game then things will be looking better again. That's what we'll be aiming for."