Arsenal now appear to be in the market for a left-back in the summer transfer window, and this could lead to a surprise exit. Mikel Arteta has four options now available to him at left-back, in Oleksandr Zinchenko, Takehiro Tomiyasu, Jurrien Timber and Jakub Kiwior. Timber has been injured for nearly the entire season, whilst there are also question marks over Tomiyasu and Zinchenko’s fitness. Zinchenko has also come in for criticism at times in this campaign, whilst Kiwior enjoyed an initial solid run in the team before it became clear that he is more suitable to a role at centre-back. This c…