Michael Ballack has backed Chelsea boss Avram Grant's decision to start Tuesday's 0-0 draw at Olympiacos with Frank Lampard and John Terry on the bench.
"I'm not sure if anyone is untouchable now. I think they are both still very, very important players for us but you have to be careful after injuries.
"I know this myself, having had eight months out. It's not an easy time when you come back - you can't play every game straight away.
"The coach has a lot of experience. He knows what he's doing."