Board Thread:Game Discussion/@comment-50.202.118.49-20150922190619/@comment-103.224.107.5-20150922201800

if you are on iOS get team mates to add you to their Game Centre Friends list, otherwise you need to be logged in to Google+ or Facebook and then you can invite your Google+ or Facebook friends to play with you - well, that's how it works in multiplayer.

In time trials before you enter race change to view Friends Leaderboard, tap the circle with 3 dots in it next to your friends and select their ghost to race against.