Takehiro Tomiyasu could return to the Arsenal squad for their crunch clash in the Champions League against Porto tonight. The 25-year-old is yet to feature since returning from the Asian Cup in February due to a calf injury. Mikel Arteta’s men have fared well in Takehiro Tomiyasu’s absence, with Jakub Kiwior stepping up and putting in some exceptional displays at left-back. Kiwior is also currently keeping Oleksandr Zinchenko out of the side after the Ukrainian returned to action against Brentford on Saturday. And after the return of Zinchenko, Arteta could also be boosted by Tomiyasu’s availa…