Hirving Lozano is expected in Italy for his Napoli medical next week, claim reports, to complete the €42m move from PSV Eindhoven.
According to La Gazzetta dello Sport, the Mexico international will be in the Peninsula on Monday or Tuesday for the final practicalities.
His agent, Mino Raiola, worked out the personal terms, including the complex issue of image rights, in a contract reported to be 60 pages long.
Pachuca are due to receive 20 per cent of the fee as part of their original €8m sale to PSV in the summer of 2017.
Raiola is also expected to get a large commission after brokering the deal.