Andy Robertson has reportedly urged Kieran Tierney to join Arsenal this summer.
Arsenal boss Unai Emery is keen to bring in Celtic defender Tierney as he looks to bolster his backline.
The Gunners have had a bid rejected by Celtic after failing to meet their valuation.
Arsenal remain hopeful of reaching an agreement with the Scottish champions, believing they will not struggle to finalise personal terms with Tierney.
And the left-back has sought advice from international teammate Robertson.
Transfer consultant Ian McGarry claims the Liverpool left-back has told Tierney to make the best move for his career.
“What has changed for Kieran Tierney is speaking to his international teammate Andy Robertson,” McGarry said on the Transfer Window.
“Having won the Champions League at the end of last season, he’s told Tierney ‘look, don’t default your career for the sake of staying at the club you support’.”
Celtic have rejected Arsenal’s initial offer for Tierney are are looking for around £30m, which would include potential add-ons.
“Celtic have told Tierney they want to cash in – that the money being offered is optimum as he came through their academy so it is 100 per cent profit,” McGarry added.
“They have indicated to Arsenal that £30m is non-negotiable and they will have to come near to that.”
Tierney flew out with the rest of the Celtic squad for their summer training camp in Austria and Switzerland on Monday.
Tierney had previously reiterated his desire to stay at boyhood club Celtic after signing a long-term deal in 2017.
But the opportunity to play in the Premier League may prove too good to turn down for the left-back, while Napoli are also monitoring the situation.