VIDEO Real Madrid 3-4 Schalke (5-4 Agg.): Highlights, Goals; Ronaldo Double Helps Madrid Hang On In Champions League Thriller

Real Madrid booked their place in the Champions League quarterfinals, but did nothing to arrest their alarming slump in form, with a 4-3 defeat to Schalke at the Santiago Bernabeu on Tuesday, leaving the holders desperately clinging on for a 5-4 aggregate win.