Chelsea boss Jose Mourinho says Newcastle United always raise their level when they play against the Blues.
The Magpies host the Premier League leaders in Saturday's early kick-off with Mourinho not worried about the absence of midfielder Nemanja Matic.
"It's difficult, a difficult stadium to play at," Mourinho said.
"There are a few stadiums in this country where, clearly, when they see the Chelsea shirts, they play the game of their lives.
"When they play against other teams they look like they're playing friendlies.
"Maybe this is because Chelsea, in the last decade, became a strong team that everybody wants to beat.
"It's a big player for us [Nemanja Matic] who isn't playing, but we trust other people.
"Matic has a bit of a holiday, a free weekend which he deserves very much. He will be back stronger. Others play and we trust him."
