Liverpool head to Porto for their first knockout tie in the Champions League since 2009. Here Press Association Sport looks at some of the issues.
Van Dijk Debut
The centre-back has six previous appearances for Celtic in the tournament but this will be the real test for the Holland international.
Liverpool kept three clean sheets in their six group matches but have won only two of their last 10 visits to Portugal—none in the last seven—and have kept just one clean sheet.
The Dutchman will be the key man as the Reds look to keep quiet Porto’s Vincent Aboubakar who has 26 goals this season, five in Europe.
Avoiding a Knockout Blow
Their results in the group stage were good, winning three and drawing three, but they head into this phase without Philippe Coutinho, who contributed five goals including a hat-trick against Spartak Moscow, after his January sale to Barcelona.
However, Porto have never beaten the Reds in four competitive meetings.
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