Each objective requires 3 wins, but you can complete them all simultaneously with a little finessing.

// REQUIREMENTS //

Torres: Any match

• Play at least (1) player from each of: Atletico Madrid, Chelsea, Liverpool, Milan, Sagan Tosu

Cameroon/Ghana: Squad Battles - MIN Pro

• Play at least (3) players from each of: Cameroon, Ghana

Colombia/Chile: Squad Battles - MIN World Class

• Play at least (3) players from each of: Colombia, Chile

So, combined, you need to tick off 17 boxes (12 nation-related, 5 club-related) with only 14 players available each match. This means you need at least 3 players that satisfy both the nation AND club requirement simultaneously. It's somewhat slim-pickings, but it is possible.

You must use (3) or more of these players:

• [1A/1B] Atletico Madrid: Santiago Arias (Colombia) OR Thomas Partey (Ghana)

• [2] Chelsea: Joao Rodriguez (Colombia)

• [3] Liverpool: Joel Matip (Cameroon)

• [4] Milan: Cristian Zapata (Colombia)

• [5] Victor Ibarbo (Colombia)

After filling those 3 spots, finish out the rest of your squad with players to completely satisfy all of the requirements.

Win the 3 matches in Squad Battles on World Class and mission accomplished!

Edit: /u/tomng12 actually beat me to the punch! See his post as well.