Bosnia and Herzegovina and Schalke left-back Sead Kolasinac has undergone a medical at Arsenal and has agreed on personal terms ahead of joining on a free transfer, according to Goal.

The 23-year-old will become Arsene Wenger’s first signing of the summer transfer window, with the manager marking the left-back position as an area that needed strengthening for next season.

The left-back, who has made a total of 89 appearances for the Bundesliga side, will arrive at the Emirates when his contract at Schalke expires at the end of June.

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The Bosnia and Herzegovina international was reportedly in London two weeks ago for a sponsorship event and underwent medical tests during his short stay in the capital.

The left-back, who joined Schalke from Stuttgart in 2011,  has made 20 Bundesliga appearances for the Royal Blues this season, scoring three goals.

Arsenal faced competition to sign the 23-year-old, with a number of European super clubs such as Chelsea, AC Milan, Manchester City, Juventus and Everton all expressing interest in the full-back.