I had just played a match earlier today and about an hour after that match, a friend on my friend's list played a friendly with me unexpectedly. I didn't know he offered a match, I didn't get a notification on my cell phone. I just logged off and logged back in and it told me to join the match. I didn't want to play a friendly match, because my players just finished playing a match and don't have full stamina. Did my players lose even more stamina from playing a friendly? Do I gain anything from playing a friendly?