Complex sentence: Neymar gave Barcelona an early lead but Barcelona could not further capitalize on the lead; a converted penalty from Cristiano Ronaldo and goals from Pepe and Benzema forced them to a 3--1 defeat.
Split into simpler sentences: Neymar gave Barcelona an early lead but Barcelona couldn't capitalize that. A penalty goal from Cristiano Ronaldo and goals from Pepe and Benzema forced them to a 3-1 defeat.