So Unai Emery's search for a left-back seems to have taken him and Arsenal's negotiations team to Scotland, where the excellent Kieran Tierney has been plying his trade with boyhood club Celtic for a few years now.
Reports have suggested that Unai Emery may be willing to sell the 30-year-old this summer as he looks to raise funds to strengthen his squad, with the Spaniard only thought to have around £40 million at his disposal.
Kieran Tierney's injury prone nature is the only potentially contentious point for Arsenal. It is believed the Scottish club are holding out for a fee of around £25million.
Tierney would certainly solve that problem, and would have no issues adjusting to the higher pace of the Premier League. But, perhaps, the time is ripe for Arsenal to move for Tierney, who might feel he wants a new challenge after winning every possible domestic trophy with Celtic.
Left-back appears to have been identified as an area of concern as Nacho Monreal is 33 and spent much of last season playing on the left side of a back three. But, the Spaniard is not agile enough to be deployed in a left wing-back role and Sead Kolasinac isn't as defensively aware of his duties and positioning while being a brilliant prospect as far as going forward is concerned.
The Mirror have claimed that Celtic are looking for 25 million pounds for Tierney.
Celtic are reluctant to let one of their academy products leave on the cheap and will demand a price increase due to United's interest in Wan-Bissaka, say The Times.
Celtic will be hoping to bring in some talented recruits this summer, but it appears that they may also be in danger of losing one of their most important players.