Which FIFA game introduced 10-versus-10 online team play?

FIFA 09 introduced 10-versus-10 online team play through its expanded Be a Pro mode.

The feature allowed as many as 20 human players to participate in one online match, with each participant controlling a single footballer. One additional position was controlled by the game, because a full football team contains 11 players. This made coordinated passing, positioning, and defending central to the experience.

Earlier FIFA games had offered online matches and smaller multiplayer formats, but FIFA 09 made large-scale team-based online play a headline feature. Players could also develop a created footballer in Be a Pro over multiple seasons.

The mode is often described as “10v10,” although the football match itself remained an 11-a-side contest. The distinction refers to the number of human-controlled outfield or goalkeeper participants available online.