In FIFA Ultimate Team™, building the best possible side requires strong Chemistry. It’s mainly about the relationships between players. Both players and teams perform at their best when their Chemistry is high, and you’ll see the results on the pitch in the form of stunning passes and epic goals.
Chemistry can be built in a number of ways. Putting players in their preferred positions and linking them with fellow players from the same Club or League will produce Chemistry. You can also build Chemistry by pairing players who have the same nationality or enlisting a manager with the same nationality as players on the roster.
Players who have been loyal to a club will obtain a Chemistry boost. Whereas a player signed via the Transfer Market will need to play ten matches before becoming loyal, all players obtained through Packs or who were initially on a squad will automatically have this boost applied.