Christopher Jullien finally shared a pitch with his new Celtic team mates on Monday after the £7million signing arrived at the club's Swiss training camp.
The French defender, signed last week from Toulouse, was put through his paces by the Hoops coaching staff.
Jullien arrived at the team hotel on Sunday night ahead of the Parkhead club's third and final game of their pre-season tour, against FC St Gallen on Tuesday.
Together with fellow new signing Luca Connell , he took part in his first training session in the scenic backdrop of Gallen.
"It was good to have the first training session of the season here," he told the club's official website.
"It's been nice to meet the guys and work with the coaches on a plan to have me fit and ready.
"There are some great players here. They haven't become winners by doing nothing.
"There's good talent in this squad and I can't wait to be playing with them."
Jullien previously played with striker Odsonne Edouard at Toulouse but that made him no less apprehensive about the possibility of having to sing in front of the squad by way of initiation.
"I'll fit in well with the players," said the former Auxerre and SC Freiburg player.
"The only one I know here is Odsonne. There are a lot of faces and I will remember them quickly.
"I hope they don't make me sing tonight.
"Hopefully that will be next week because I don't have a song in mind. I will think about it this afternoon and we will see!"
