Celtic manager Neil Lennon has paid tribute to the "absolute courage and positivity" of retiring Stiliyan Petrov
Celtic live updates
Tomas Rogic flew into Scotland today to tie up a move to Celtic after Central Coast Mariners accepted a bid for the Australian midfielder.
The 20-year-old arrived at Prestwick Airport with the rest of the Celtic squad following their training camp in Spain.
Wishing everyone a Merry Christmas when it comes...i hope Santa is good to youFrom @OfficialNeil on Twitter: