Lyon winger Maxwel Cornet is attracting Premier League interest.
The Mirror says Watford are keen on Cornet - but it will cost them.
French sources claim the Hornets are 'in discussions' over a £20 million deal.
The 20-year-old Ivory Coast international is also a target for AC Milan.
Watford are looking to add players this window with Javi Gracia reported to be wanting no fewer than three new arrivals.