Tottenham boss Ange Postecoglou says Heung-mon Son is key to the success of his system.
Posetcoglou made Son his captain this season.
He said, "He has been outstanding as a leader and on the field. I have named him '9' and he always works hard. He always thinks first about the team, but he puts himself in that position and has the quality to finish.
"It's one of the reasons. I have in my head the image of what I want the team to be like and Sonny, whether on the wing or in the centre, has all the characteristics to shine in it.
"He can play in any system, but he is ideal for ours."