Casillas, 36, made his 178th UEFA club competition appearance, a record 167th in the Champions League, at Anfield, and came up with five saves.
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Liverpool are through to the Champions League quarterfinals for the first time since 2009, beating Porto 5-0 on aggregate in the round of 16.
Liverpool advanced to the quarterfinals of the Champions League for the first time in nine years with a goalless draw vs. Porto at Anfield on Tuesday.
Sergio Conceicao concedes his Porto side are playing for pride in their Champions League last-16 second leg tie at Anfield.
Liverpool's front three were at their merciless best, ripping Porto to shreds and building further belief in a long European run, writes Glenn Price.
Liverpool ran roughshod over Porto in their Champions League round-of-16 first leg, beating them 5-0 at the Estadio do Dragao on Wednesday night.
Porto's high-scoring attack could be missing its biggest weapon in Vincent Aboubakar for the Champions League round-of-16-match against Liverpool.
Which eight clubs will make it through to the Champions League quarterfinals? Here are our writers' predictions.
Two former winners collide in the round of 16 in Porto and Liverpool. Their respective tales after lifting the trophy are ones of missed chances.
Miguel Layun's move to Sevilla is now official, with the club confirming his loan move from Porto along with the arrival of Swansea's Roque Mesa.
Mexico coach Juan Carlos Osorio is delighted Miguel Layun is set to move from Porto to La Liga side Sevilla.
Porto's Liga match against Estoril was suspended on Monday for safety reasons after fans feared a stand would collapse.
Moussa Marega to Man United and Harry Maguire to Man City are two of today's transfer rumours, courtesy of Football Whispers.
Porto coach Sergio Conceicao has given a strong indication that goalkeeper Iker Casillas will remain at the club in January.
The draw for the Champions League round-of-16 has been made, and there's one clash that stands out as Neymar's PSG take on champions Real Madrid.
The business end of the Champions League starts here. The draw for the round-of-16 has been made, and there's a bunch of intriguing clashes.
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