Cristiano Ronaldo became the all-time leading goalscorer in European competitions as Real Madrid sneaked into the quarter-finals of the Champions League 5-4 on aggregate despite losing a seven-goal thriller 4-3 to Schalke on Tuesday.

The holders looked well set for a place in the last eight for a fifth consecutive season after cruising to a 2-0 win in Gelsenkirchen three weeks ago, but they were given an almighty scare as Schalke twice took the lead in the first-half through Christian Fuchs and Klass-Jan Huntelaar.

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Ronaldo twice responded with textbook headers to take his tally in European competitions to 78 and surpass former Real and Schalke legend Raul in the process.

Karim Benzema then put the hosts in front on the night early in the second-half, but Schalke earned a fully merited win thanks to further strikes from Leroy Sande and Huntelaar.

Meanwhile, Porto remained unbeaten in the Champions League this season and qualified for the quarter-finals for the first time since 2009 as they defeated Swiss side Basel 5-1 on aggregate.

Goals from Yacine Brahimi, Hector Herrera, Casemiro and Vincent Aboubakar, combined for a 4-0 win at the Estadio do Dragao, and continued Basel’s poor form in Portugal as their coach Paulo Sousa endured a miserable return to his homeland.

The first leg had finished 1-1 three weeks ago in Switzerland.