Mikel Arteta has now explained why Takehiro Tomiyasu was left out as Arsenal took on West Ham United on Sunday afternoon. Takehiro Tomiyasu was one of a number of first-team stars to miss out as Arsenal thrashed West Ham United 6-0 at the London Stadium. Along with the Japanese defender, Gabriel Jesus, Emile Smith Rowe, and Oleksandr Zinchenko were all left out of the squad for fitness reasons, along with long-term absentees such as Jurrien Timber, Thomas Partey, and Fabio Vieira. In the absence of any other recognised left-back, Jakub Kiwior filled in at full-back for the match. Despite being…