Sead Kolasinac is Arsenal’s foot through the door

The signing of Bosnian Sead Kolasinac suggests Arsene Wenger has eventually accepted one can’t always pick a lock with a hair clip, says Simon Collings.

After watching Sead Kolasinac for a matter of minutes is not too difficult to understand why he is nicknamed ‘The Bosnian Hulk’.

Nor is it hard to comprehend why his former manager at Schalke, Jens Keller, once compared him to a tree. Kolasinac is, by any measurement, quite the unit.