Koscielny comes through injury return
Laurent Koscielny's return to competitive action after a long-term injury has been described as "a great positive for the club".
The France international hadn't played since rupturing his Achilles in May's Europa League semi-final against Atletico Madrid.
But on Monday night he stepped out to play for the Gunners' Under-23 side in what turned out to be a 5-0 defeat to the Premier League 2 leaders Derby. The 33-year-old played only the first half, during which Arsenal conceded just the one goal.
Speaking about Koscielny's first game back, Arsenal's Under-23 head coach Freddie Ljungberg told the club's official website: "Of course it's great - and especially so because Koscielny came through it.
"He looked OK afterwards so that's a great positive for the club. The players will learn a lot from him.
"I thought he did really well and I'm happy that he feels OK."
Koscielny could now travel to Ukraine with the Arsenal first-team for Thursday's Europa League clash with Vorskla Poltava.
The squad for that game is expected to be of a largely second-string nature given Sunday sees the first North London derby of the season against old rivals Tottenham.