- Celtic defender Kieran Tierney boarded the plane on Monday for pre-season
- The treble winners flew out to Austria as they prepare to commence training
- Tierney is a target for Arsenal but they are yet to agree a price with Celtic
- The Gunners opening bid of £15m was rejected as the Scottish side want £25m
Kieran Tierney travelled with Celtic to Austria for their pre-season training camp on Monday night – but there was no sign of Tom Rogic or David Turnbull.
The subject of a failed £15million opening bid from Arsenal, Tierney will face the biggest decision of his career if Unai Emery sanctions an improved offer of closer to £25m in the coming days.