Since the Frenchman joined the Andalusians in January 2017 he has come on leaps and bounds, becoming one of the most sought-after centre-halves in the Spanish top flight.
According to the aforementioned source, 'Los Blancos' boss Zinedine Zidane is a huge fan of the 22-year-old and is keen to push through a summer move as he reshapes his squad.
With Real Madrid on the look out for a centre-back, Lenglet's youth, La Liga experience and potential have pushed him to the top of Madrid's wanted list.
However, Barcelona had previously put the wheels in motion on a move behind the scenes, something which the player himself acknowledged.
Despite Sevilla having no interntion of selling, Lenglet's future is anything but certain, with a €30m release clause unlikely to dissuade Spanish football's biggest fish from swooping for the France U21 star.