England's Under-20 World Cup campaign suffered a blow after Fikayo Tomori's comical own goal gifted Guinea an equaliser in the side's second group game on Tuesday.
The Young Lions were in control after Bournemouth midfielder Lewis Cook fired Paul Simpson's side ahead with a fine strike from outside the box after 53 minutes.
But England, who won their opening group game 3-0 against Argentina in South Korea, suffered a setback just six minutes later when Tomori put though his own net from fully 60 yards.
The 19-year-old, who made nine appearances on loan at Brighton this season, opted not to look up as he fired the ball back to his goalkeeper under pressure near the centre circle.