The Chilean got here just about leaving Arsenal within the transfer window with Manchester City determined to signal him.
However, Arsene Wenger blocked a transfer for the attacker leaving Alexis Sanchez with out a selection however to stick at Arsenal, regardless of short of to play below Pep Guardiola on the Etihad.
Sanchez has scored one function in 5 appearances for the Gunners in all competitions up to now and Koscielny believes the 28-year-previous is giving his taken with the membership.
“Alexis is an important player for us,” mentioned Koscielny.
“I understand it was once a hard state of affairs with the transfer window however now it’s completed and I feel he’s curious about his process, on his efficiency and on his membership.
“He’s an Arsenal participant and he is aware of that he must play and he wishes to attain some targets and provides assists to be higher.
“He’s nonetheless running on a daily basis like he did sooner than, so an important factor is to stay his head cool and simply play and experience.”
Sanchez’s most effective function of the marketing campaign thus far got here in Arsenal’s three-1 win over Cologne of their Europa League opener.
The former Barcelona famous person can be hoping so as to add to his European tally on Thursday night time when the Gunners go back and forth to BATE Borisov.
But Sanchez will first have the risk to open his Premier League account when Arsenal host West Brom this night (8pm).