Neil Lennon has revealed that James Forrest underwent ankle surgery yesterday.

The Hoops boss has told that the Scotland winger will be out for six to eight weeks if the surgery is succesful.

Ahead of the Europa League clash with Sparta Prague at Celtic Park on Thursday, Lennon said: “His foot was in a pot, a boot, for the last couple of weeks but when it came out of the boot there was no significant improvement, in fact it was getting worse.

“So he went to see a specialist and he recommended the surgery being done, and it was done yesterday.

“We think it has been a success but we are looking at quite a considerable time out still.

“Best-case scenario is probably six to eight weeks – but it may be longer than that. We will see how he settles after the surgery.”

Meanwhile, Lennon hopes to welcome Christopher Jullien back into his Celts squad following the upcoming international break.