Cristiano Ronaldo scored a hat-trick to send Real Madrid through to the Champions League semi-finals with a 4-2 extra-time win against 10-man Bayern Munich to seal a 6-3 aggregate victory in controversial circumstances. A bizarre Sergio Ramos own goal forced the extra period after Robert Lewandowski opened the scoring for Bayern from the penalty spot and Ronaldo equalised.Ronaldo put Madrid level at 2-2 on the night in the first period of extra time when he scored his 100th Champions League goal, from a clearly offside position, before he wrapped up his treble and Marco Asensio added a fourth.