The Chelsea centre-back managed to beat Dean Henderson from near the half-way line after launching a backpass towards his goalkeeper.
Henderson was left scrambling to reach the ball but his desperate attempts failed and it rolled into an empty net.

Howler! England youngster scores own goal from 50 yards

U-20 World Cup
Four takeaways from England's U20 success: Solanke a star, questions remain
11/06/2017 AT 15:09
England had taken the lead just after half-time through Bournemouth midfielder Lewis Cook but Tomori's error earned Guinea a draw.
England remain top of Group A after Saturday's 3-0 win over Argentina and play hosts South Korea in Suwon on Friday.

U20 World Cup: England held by Guinea

U-20 World Cup
HIGHLIGHTS: England win U20 World Cup after Calvert-Lewin strike
11/06/2017 AT 12:04
U-20 World Cup
Woodman saves penalty as England win Under 20 World Cup
11/06/2017 AT 09:57