Cardiff City owner Vincent Tan admits the club have been left stunned by the disappearance of Emiliano Sala.
Sala is feared dead after Guernsey Police called off the search for his missing plane on Thursday.
Sala was travelling back from Nantes to Cardiff as he prepared to link up with his new teammates following his £15m move.
Tan said: "Monday evening's news shook everyone at Cardiff City FC to the core.
“We were looking forward to providing Emiliano with the next step in his life and career.
“Those who met Emiliano described a good-natured and humble young man who was eager to impress in the Premier League.
“The response from the football community has been truly touching and we place on record our sincere thanks to those who have sent messages of support.
“We also thank everyone involved with the search and rescue operation, and continue to pray for Emiliano, David Ibbotson and their families."