The former Netherlands striker watched his old club exact revenge for their semi-final defeat last season while taking part in Heineken's 'Share The Sofa' eventReal Madrid sealed revenge over Borussia Dortmund in emphatic style with a 3-0 win at the Santiago Bernabeu in the first leg of their Champions League quarter-final.
Former Blancos striker Ruud van Nistelrooy tweeted his thoughts on the game for Heineken as part of their '#ShareTheSofa' night. He was left blown away by the intensity of Jurgen Klopp's side and the clinical nature of Madrid's victory, which saw Cristiano Ronaldo equal Lionel Messi's record for Champions League goals in a season.
Goal compiled a list of our favourite tweets from the Dutchman during and after the game...
Van Nistelrooy on Real Madrid
"They can't stop Ronaldo. He keeps flying past their defence."
"Fantastic block from Pepe. That's some of the best defence you'll see this year."
"Isco's shot was so quick the keeper didn't have time to react. Ronaldo-esque."
"You can see the difference Ancelotti's brought to Real. More creativity in midfield. Not just strong attack and defence."
Van Nistelrooy on Borussia Dortmund
"Another amazing save from Dortmund's keeper - that's three clear goals he's somehow managed to stop."
"Dortmund really missing Lewandowski. A bizarre haircut is no substitute."
"Dortmund will go ballistic in the second leg - those 80,000 Dortmund fans are going to make it a clash to remember."
VAN NISTELROOY ANSWERS GOAL'S QUESTIONS
Can Borussia Dortmund trouble Real Madrid tonight, despite their injury and suspension problems?
How do Dortmund get back into this? Can Madrid start thinking out the semi-finals?
Van Nistelrooy: "No! 3-0 is hard to turn around, but not impossible."
Van Nistelrooy: "A team's always bigger than an individual, even an individual as big as Cristiano."