Captain Chelsea Gary Cahill the last two days was under the care of doctors, but his illness is unknown.

As informs The Telegraph, Cahill was hospitalized on Tuesday after training, when he felt unwell. And left the hospital only on Thursday.

However, the player's disease remains unknown. Chelsea has not yet commented on the situation with Gary.

Now Cahill's participation in the semi-final match of the FA Cup against Tottenham (April 22) is under big question.

In the current season, 31-year-old Cahill spent Blue 37 games in all tournaments and scored 6 goals.