It is 10:30am in the Carre, the plush VIP area at Paris St-Germain’s stadium and a VVIP arrives, in a tailored dark suit. It is the new prince of the Parc des Princes. In an hour or so Kylian Mbappe will be presented to the world’s media following his extraordinary €180?million (£165?million) transfer from Monaco but, for now, it is just him and Telegraph Sport – plus Mbappe’s father, Wilfried, and his little brother, Ethan. Mbappe is still just 18. Two summers ago he was celebrating passing his French highschool exams, insisting he completed them before furthering his football career; last season he was being driven to training by his mother, Fayza, a former hand-ball player, while he did not have time this summer to finish his own driving lessons because “things got a bit complicated”. They did indeed get complicated. Now he is the world’s most expensive teenager, and the second most expensive footballer ever, after his new team-mate, Neymar, who also arrived this summer for €222million (£202.8million) from Barcelona. Along with Edinson Cavani, they are poised to create the most thrilling new forward line in football.