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

Club-record signing Virgil van Dijk is set for his Champions League debut after moving to Anfield for £75 million in January.

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

PORTO, PORTUGAL - Tuesday, February 13, 2018: Liverpool's manager Jürgen Klopp during a training session at the Estádio do Dragão ahead of the UEFA Champions League Round of 16 1st leg match between FC Porto and Liverpool FC. (Pic by David Rawcliffe/Propaganda)

Liverpool are playing in the knockout stages of the Champions League for the first time since 2008/09, when they went out to Chelsea in the last eight.

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.


Can European Entertainment Be Extended?

SEVILLE, SPAIN - Tuesday, November 21, 2017: Liverpool's Roberto Firmino celebrates scoring the third goal during the UEFA Champions League Group E match between Sevilla FC and Liverpool FC at the Estadio RamÛn S·nchez Pizju·n. (Pic by David Rawcliffe/Propaganda)

Jurgen Klopp’s side topped their Champions League group scoring 23 goals, a record for an English club and a total surpassed only by Paris St Germain (25), also this season.

Nineteen of…

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