Bale's braces at Real Madrid
The Welshman has scored two or more goals in seven games.
Bale's goal saw Wales beat Cyprus, while Modric and Kovacic were involved as Croatia drew with Azerbaijan.
The event, which was inaugurated in 1999, is held in Nyon.
The Whites visit the Vicente Calderón on matchday seven of the La Liga campaign.
The Whites completed the day's work out on pitch 3.
The champions get up and running at home to Valencia Basket on 10 or 11 October.