barcelona reached the champions league semi-finals at the nou camp at paris saint germain 's expense and neymar tied david luiz in knots in the process .
there were no luis suarez nutmegs this time but the former chelsea defender found himself backpedaling hopelessly on the quarter hour as neymar scooted past for barcelona 's opener .
luiz was also booked inside the first five minutes for a foul on andres iniesta .