The 18-year-old was beaten by John Isner, who lost the final to Roger Federer, but rose to a career-high world ranking of 33 on Monday.

Auger-Aliassime is the youngest player in the current world top 50.

"I have great memories from my junior career at the Caja Magica, where I hope to produce some magic again," he said.

Spain's former world number three David Ferrer - in his final season before retirement - had already been offered one of the four wildcards on offer.

The Madrid Masters takes place from 5-12 May.