Billy Gilmour was substituted in the 80th minute of the Tuesday night victory over Crystal Palace in the Premier League.
It turns out that the change may have more enforced rather than tactical.
According to several sources, although there is nothing official from the club or the player is that the 19-year-old Scottish U21 international has picked up a knee injury.
The outlook is not good and word is he will not feature again this season.
This will disastrous news for Lampard as the race for a top-four spot and a place in next seasons Champions League hots up.
On top of that, the Blues face strip to Germany for their Champions League second leg against Bayern Munich.
Lampard is already without N’Golo Kante and losing one of his breakout star youngsters of the season will be unwanted news.
Gilmour’s likely replacement will be Jorginho, who has spent a lot of time on the bench following transfer speculation of a move back to his native Italy.
