Once two players are friends, they will need be invited by the other via one of using the Online Friendlies menu or the "Ways to Play" screen that pops up when you set up the Friendlies game and EAFC 26 Coins within FIFA Ultimate Team Mode. If the former is the former, they'll be required to click"Play a Friend" or the "Play a Friend" option and then select their friend from the list of friends...