Mikel Arteta would be wise to let one Arsenal player leave the club this summer if an acceptable offer is made. Jakub Kiwior could be prised away from Arsenal in the summer transfer window. The £21 million former Spezia man did not begin the season as a key player for the Gunners. However, a spate of injuries saw Mikel Arteta call upon Kiwior to fill in as a makeshift left-back for an extended period during the middle of the campaign. The 24-year-old largely impressed during this period. Kiwior was described as a “monster” for the dominant performance he put in against Porto in the Champions L…