Joao Mario and Gabriel Barbosa were undergoing medicals with Inter Milan yesterday.
Santos striker Gabigol flew in yesterday morning from Brazil and is currently undergoing the first part of his medical.
Sporting CP winger Joao Mario also arrived at the Linate Airport in Milan in the afternoon on a private jet.
After months of negotiations, Inter finally struck a deal with Sporting CP for the Portugal international, believed to be worth €45m.
It is not yet clear whether Gabigol, who turns 20 next week, will come to Inter straight away for €25m or remain at Santos on loan until January.