Borrusia Dortmund: 8 Possible Signings this Summer

#1 Kieran Tierney (Celtic)

Celtic v Motherwell - Scottish Ladbrokes Premiership

Kieran Tierney is a 21-year-old left-back who currently plays for Celtic in the Scottish Premiership. He has also featured for Scotland's national team 12 times since making his debut in March 2016.

Although a hip injury forced him out of many games for Celtic this season, Tierney has still managed to play in 18 matches and register 5 assists in the process. Tierney has a turn of pace on him that leaves defenders lagging behind and if they fail to reach him in time, he can whip in a devastating ball for his teammates to score with ease.

Tierney has been with Celtic for the entirety of his footballing career, having progressed through their youth academy, to the U17s, and the U20s, before finally being called up to the first team in 2015, when he was just 18 years old.

Kieran Tierney would make for a great tactical fit at Signal Iduna Park, especially with him ticking all the boxes that Dortmund often use to scout players: young, agile, and quick. His current price tag is estimated to be at around £12m, a worthwhile fee for a player of his quality.