By Samuel Meade Kieran Tierney conceded his time at Arsenal could be up as he underlined his desire to “make the most” of his career. The Scot was signed by Unai Emery but gradually fell out of favour once Mikel Arteta arrived. With minutes at a premium the former Celtic defender opted to head out on loan to Real Sociedad, where he’s made himself a regular amid talk of a permanent move. Tierney faces huge competition at the Emirates if he is to wrestle back at starting berth and he’s not naive to the fact that he may have to move on. If that is the case the 26-year-old wants to find a home tha…