France were fortunate in their 2-1 opening win over Australia and they had slices of luck again at the Ekaterinburg Arena on Thursday.
Mbappe's goal, which came from close-range after Olivier Giroud's shot took a wicked deflection to beat goalkeeper Pedro Gallese, saw the 19-year-old become the youngest player to score for France at a major international tournament.
As they did in losing narrowly to Denmark, Peru had plenty of chances, returning captain Paolo Guerrero firing at Hugo Lloris and Pedro Aquino clipping the post with a super strike from range.
