Burnley manager Sean Dyche is expecting a tough game against Chelsea when the Blues visit Burnley on Thursday.
Burnley won 3-2 in the reverse fixture at Stamford Bridge, having gone into half-time 3-0 up.
“Chelsea have had a few challenges this season, but you only have to look at the Southampton game to remind yourself,” Dyche said.
“It is a funny thing against the real top sides, against any side in the Premier League, but particularly the top sides they can look quiet.
“And then literally over a matter of minutes pick it up and all of a sudden they look like a different side. We’ve seen it right in front of our eyes, I’ve have seen it through live games, TV screens, many times.
“One team, a slightly lesser team like ourselves on paper, looking at that game and thinking ‘there is nothing in this’.
“But then boom boom boom and it’s done. That’s the power of the real top teams. Chelsea still have that. Make no mistake we are moving forward but we are not there, we still have to work for every inch.
“I’m not saying they don’t but they have players who can turn it on for a little window in the game and it can make a whole difference to the outcome.
“We are certainly moving forward, I don’t think we are at the level of the top six where they are week in week out, but we are improving.
“But you can’t suggest ‘oh yeah this is normal to be 3-0 up against any of the top six’ because that is very difficult to do.”