Chelsea midfielder Ruben Loftus-Cheek believes he's overcome his back injury woes.

Loftus-Cheek was Chelsea's star man in their Europa League semi-final draw at Eintracht Frankfurt on Thursday before being withdrawn late on due to cramp.

The Daily Mail reports the England midfielder is confident the long-standing problem is well under control.

Loftus-Cheek has reported no concerns for almost two months, with a period of rest earlier in the season proving crucial.

Sarri said after the Eintracht game: "We have to control him. He needs probably a particular way of training... I think for a long period, probably forever. But I think we can avoid an operation."