Manchester City-owned Celtic winger Patrick Roberts featured against St. Mirren in the Scottish Cup on Sunday.
Mikael Lustig has signed a new deal with Celtic, but confirmed that he considered his options beforehand.
The experienced defender has signed a new contract at Celtic meaning Gamboa will remain an understudy.
Mikael Lustig has established himself as an important player for Celtic.
Celtic manager Brendan Rodgers speaks highly of Mikael Lustig.
Celtic certainly did not disgrace themselves during the six games in the competition.
Celtic drew 1-1 with the Premier League side on Tuesday.
Mikael Lustig has made 24 appearances for Brendan Rodgers' Celtic side so far this season.
The Celtic defender has praised two of his team-mates.
Celtic defender Mikael Lustig says that he wants to remain at Celtic Park.