For Surround/Eyefinity, if you switch to exclusive full-screen mode (Alt+Enter), then FIFA 18 has a bug whereby the player indicator (red triangle) no longer appears over the player in the correct position, which makes it pretty hard to know which player you're controlling. The only fix I've found is to not use exclusive full-screen mode, but instead use Borderless Gaming to do windowed full-screen. The player indicator then appears in the correct position. Hopefully they fix this in a future FIFA.
https://github.com/Codeusa/Borderless-Gaming/releaseshttps://answers.ea.com/t5/Technical-Iss ... 333/page/4