The EPL giants are targeting the 24 year old Switzerland international and Vfl Wolfsburg left back in this transfer season.
Chelsea team and Arsenal team have scouted the 24 year old youngster as a, adequate player for them who is playing currently with the German Giants Vfl Wolfsburg.
The 24 year old Swiss international is with the German team since 2012 and so far for them he has made 157 appearances for them and also netted 20 goals for them.
The Arsenal side scouted him in the early transfer season but they fail to bring him to the Emirates Stadium last time and this season along with Arsenal the Chelsea side joins the race for him.
The Chelsea and Arsenal side are ready to pay 21m for the left back.
The 24 year old left back is happy with his side and currently he is enjoying his football with them this season also he has made 36 appearances for them and scored 3 goals for them.