The forward went down injured after a 23rd-minute aerial collision with Marseille defender Chancel Mbemba, leading to a lengthy break in play.

In visible pain and struggling to walk, Son was helped off the field by Spurs' medical staff as his side went on to secure their place in the Champions League knockout stages with goals from Clement Lenglet and Pierre-Emile Hojbjerg.

Spurs announced on Thursday that Son had sustained an injury to his left eye and would require surgery.

In a statement on the club's official website, Spurs said: "We can confirm that Son Heung-min will undergo surgery to stabilise a fracture around his left eye.

"Following surgery, Son will commence rehabilitation with our medical staff and we shall update supporters further in due course."

The announcement throws serious doubt on Son's availability for the FIFA World Cup, with South Korea set to kick off its tournament against Uruguay in just 22 days.

Son's injury is also a big blow to Spurs, with fellow forwards Dejan Kulusevski and Richarlison still sidelined as they prepare to face Liverpool in the Premier League on Monday.