Thats actually the wrong thing to do. You need 5 points to get the reward. So taking fnatic 3-0 instead of just putting them as to advance make you risk 3 games for the easiest team tonadvance for the same point.
There 0 value in putting fnatic or nrg 3-0 simply put them as advance.
Put your 7 locks to advance and let the 3-0 go theres no value to it.