The club has been linked to players around the world, with Aston Villa's Emiliano Martinez and Barcelona's Marc-Andre Ter Stegen top of the list. Ruben Amorim's priority has been signing attacking options, but with an injury set to sideline Onana for six to eight weeks, Amorim is on the lookout for a bargain shotstopper.

The 29-year-old Cameroon international has responded well to initial treatment and will join his team-mates on the flight to America later this month.