It was an important step for Kiwior, who will be hoping to get his first taste of first-team action in the next couple of weeks. The Poland international joined from Serie A side Spezia for a fee of around £21million.
He is yet to play a single minute after being a regular for Spezia in the first half of the season. Gabriel is irreplaceable at the back, but if he were to suffer injury or suspension, Kiwior would be first in line to replace him.
The 23-year-old is left-footed and Arteta would likely prefer that balance rather than choosing the more experienced Rob Holding. Kiwior getting minutes, albeit with the under-23s, was much needed.
He will likely come into the team for the Europa League tie against Sporting Lisbon, as will Smith Rowe. But Arteta now knows he has almost two entirely new options to call upon in the hunt for a first title since 2004.
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