Manchester City captain Vincent Kompany says Cheick Tiote's death at the age of 30 is devastating.
He's just one of the many players and clubs who have paid tribute to the former Newcastle midfielder.
He collapsed while training in China yesterday.
Tiote moved to the club in February to join.
In a statement yesterday, his agent said "It is with deep sadness that I confirm that my client Cheik Tiote sadly passed away earlier today after collapsing in training with his club Beijing Enterprises."
See some of the tributes below.