How do you handle split pushing?
I am not sure how to handle split pushing. It seems that any time an enemy team gets a strong split pushing champion they tend to win just because of that.
My last game for example, they had a fiora who some how got fed off my Nasus. They had a Xerath and sivir who were able to clear waves instantly. Even though we had a strong lead and every lane, aside from top, was doing great. We lost due to the amount of split pushing the enemy had done. We had to send more than 1 to stop fiora from splitting which left our other 3 against 4 people who cleared waves well.
My question is: How do I handle split pushing? What do I do when i see someone fed splitting when forcing engages isnt a feasible option.
edit: adding games mentioned. http://matchhistory.na.leagueoflegends.com/en/#match-details/NA1/1761045207/46796382?tab=overview