Kylian Mbappe will officially make his switch from Monaco to Paris Saint-Germain permanent in the summer after a curious clause in his contract was activated.

PSG are now obliged to pay the huge £166million price tag for the striker after becoming mathematically safe from relegation following their 5-2 victory over Strasbourg on Saturday afternoon.

The 19-year-old is currently on a season-long loan and could only make the switch permanent once Unai Emery's side had secured top-flight football next season.

Kylian Mbappe will make his move from Monaco to Paris Saint-Germain permanent in June

This was confirmed when PSG maintained their perfect home record at the weekend.

The emphatic win also restored their 12-point advantage at the top of Ligue 1 table and are now 42 points above the relegation places with only 12 games left to play.

Mbappe will sign a four-year deal in June to keep him at the club until 2022.

The striker has scored 15 goals in 32 appearances in all competitions this season and has contributed a further 14 assists.

The Frenchman's high-profile move will come a year after the club paid a world-record £198million to sign Neymar from Barcelona.