The Gunners star was exposed in Arsenal’s 3-1 loss to Manchester United in the FA Cup fourth round at The Emirates last week.
Kolasinac was caught out on a number of occasions to leave his centre-halves without support against Manchester United’s dangerous counter-attack.
The Bosnia international has started 17 games in all competitions in Emery’s first season in charge of the north London side.
He made amends for a poor FA Cup performance by winning a second-half penalty to allow Pierre-Emerick Aubameyang to score from the spot in a 2-1 win over Cardiff on Tuesday night.
His predecessor Arsene Wenger signed Kolasinac in a free transfer from Schalke 04 in the 2017 summer transfer window.
While Kolasinac has often impressed with his ability to push forward down the left wing, his defending has often been questioned.
Former Arsenal midfielder Parlour raised questions about Kolasinac’s ability to defend as a left-back in a back four.
“Kolasinac is playing like a left winger,” Parlour told Sky Sports.
“Whether he has been taught how to play at left-back, I don’t know. When he was bought from Germany, he was a very good wing-back. He had three centre-halves to cover him.
“When he plays as a four, he has to be a bit more defensive minded.”
Kolasinac has scored five times in 52 games in all competitions in his first season and a half at The Emirates.
Arsenal are struggling with injuries at the back and Hector Bellerin suffered a serious knee injury in a 2-0 win over Chelsea FC last month.
The Gunners are looking to secure a top-four finish for the first time since 2015-16 and book their place in next season’s Champions League competition.
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