Celtic manager Neil Lennon says his sympathy goes out to Kilmarnock's Liam Kelly and his family.
Killie beat the Hoops 1-0 at Hampden in the Scottish League Cup final yesterday.
But the day turned to tragedy as Liam's father suffered a heart attack at full-time and died later in hospital.
Lennon said: "It makes my disappointment (at losing the match) pale into insignificance…I can only send out my condolences to him and his family."