Alli drove down the left flank and cut back for Son, who took a touch before effortlessly curling into the top corner.
Check it out for yourself here:
Heung-Min Son puts Tottenham Hotspur 2-1 ahead in Dortmund. #COYS#THFCpic.twitter.com/6lXH6Vl7uA
— Last Word On Spurs