Juventus turn the page on yet another Champions League disappointment as they focus on sealing an eighth consecutive Serie A title at home on Saturday.

Tottenham have earned a Champions League semi-final clash against Ajax, beating Manchester City on away goals after a 4-3 defeat secured a 4-4 aggregate score in one of the games of the season on Wednesday.

Jurgen Klopp admitted he cannot wait to lead Liverpool into a Champions League semi-final against Barcelona after watching his side crush Porto 4-1 in Portugal on Wednesday to complete a 6-1 aggregate victory in their last-eight tie.

Manchester City manager Pep Guardiola insisted VAR does produce "fair football" despite a cruel Champions League quarter-final exit on away goals to Tottenham after a pulsating tie ended 4-4 on aggregate.

Even Cristiano Ronaldo was not enough for Juventus to end their 23-year wait for the European title as they crashed out in the Champions League quarter-finals for a second consecutive year.

Shares in Italian club Juventus fell more than 17 percent in early trading on Wednesday after Cristiano Ronaldo's side were knocked out of the Champions League quarter-finals by Ajax.

Pep Guardiola's bid to win the Champions League for the first time since 2011 will come under threat from his old friend Mauricio Pochettino when Manchester City face Tottenham in the quarter-final second leg later on Wednesday.

Juventus coach Massimiliano Allegri announced on Tuesday he would be staying on as coach with the Italian giants next season despite another Champions League disappointment.

Ajax stunned Juventus to reach the Champions League semi-finals for the first time since 1997 as Matthijs de Ligt's thumping second-half header secured a 2-1 second-leg victory in the last eight in Turin on Tuesday.

Ole Gunnar Solskjaer completed Manchester United's most famous comeback at Camp Nou in 1999 and he will try to oversee another there on Tuesday when his team take on Barcelona.

Four years have passed since Lionel Messi last reached a Champions League semi-final and his drought has become a source of unease for Barcelona ahead of their latest attempt on Tuesday.

Manchester United travel to Barcelona on Tuesday needing another miraculous Champions League fightback from a 1-0 first-leg defeat on home soil to make the semi-finals.