The loss of Takehiro Tomiyasu to injury could leave Arsenal regretting their decision to let fellow right-back Cedric Soares leave on loan in January.
Japan international Tomiyasu suffered a season-ending knee problem during the Gunners' Europa League exit at the hands of Sporting CP. After coping without the defender on Sunday during a win against Crystal Palace, they confirmed he will miss the remainder of the campaign.
While Ben White's form has made Tomiyasu's absence manageable, the lack of cover could become a worry during a crucial stage of the season. As Mikel Arteta prepares his side for 10 huge league games, he'll hope the avoidable loss of Cedric doesn't prove too much of a problem.