Chelsea manager Frank Lampard says Christian Pulisic's injury isn't as bad as first feared.
The American winger was forced to sit-out last weekend's win over Burnley after picking up a knock.
"Christian had a scan yesterday that showed a very, very minor injury to his hamstring, very minor. So he's already back outside. He won't be fit tomorrow, but we'll see after that," the 42-year-old told a press conference ahead of Wednesday's clash with Rennes.
"It is obviously a relief for the injury to be minor. He made the right decision in not attempting to play the game, because he could have made it worse. So it's clearly a relief that he will be back very soon, because he's an important player for us.
"With the actual muscle injuries, it's a hard one to call, it's forever going to be a challenge, some players that play on the edge, have such speed and acceleration in their game, maybe they can be more susceptible.
"I don't think that's a one-size-fits-all answer, because it's different for everybody. From last season we were looking at ways of managing Christian and looking at ways of being proactive in not hopefully getting so many injuries, I know that's something he's experienced previously in his career at Dortmund as well.
"So we're all working in the same direction on that one, to try to get him to be as fit as regularly as possible, because we all know his talent."
