Neymar will miss Paris Saint-Germain's game against Nantes on Sunday in Ligue 1 due to a lingering thigh injury.
Jurgen Klopp's Liverpool have won just three of their last 12 games and fly to Budapest for the last 16, first-leg tie against Leipzig on the back of three straight Premier League defeats.
The February 16 first leg "will now take place at Puskas Arena in Budapest," European football's governing body confirmed.
Ronald Koeman again rested Lionel Messi with qualification for the last 16 already assured, and Barca made it five wins from five in Group G with an impressive performance in Budapest.
Lukaku's double gave Inter their first victory in the Champions League this season in a rollercoaster game, blowing Group B wide open ahead of the final round of group matches next week.
Liverpool were without a host of key players for the visit of Ajax to Anfield in Group D, with 22-year-old Irishman Caoimhin Kelleher starting in goal in the absence of Alisson.
Madrid's 3-1 victory over Barcelona in the Clasico on Saturday swerved a third consecutive defeat after losses to Cadiz in La Liga and Shakhtar Donetsk.
Bayern host Atletico Madrid on October 21 in their opening Champions League group match, but the terraces at the Allianz Arena must remain empty.
Around 5,000 supporters had gathered at Paris's Parc des Princes to cheer on PSG, lighting flares and chanting as they watched the 1-0 defeat in Lisbon on a big screen.
Bayern players savoured the moment after Kingsley Coman's goal saw them defeat PSG 1-0.
The spotlight will no doubt be on Mbappe and Neymar who have combined for eight goals and nine assists in the competition thus far.
Bayern will bid for their sixth European Cup triumph when they come up against Neymar and Kylian Mbappe on Sunday.
After scoring in both legs against Borussia Dortmund in the last 16 he was outstanding in the 2-1 quarter-final win over Atalanta last week in Lisbon and even better in the 3-0 demolition of Leipzig.
Defender Jerome Boateng has compared the current squad to the 2013 outfit who landed the first treble of Bundesliga, German Cup and Champions League titles in the club's history.
City had looked on course to come back and win the tie behind closed doors at the Estadio Jose Alvalade after Kevin De Bruyne's goal midway through the second half had cancelled out Maxwel Cornet's first-half opener.
The French team defeated Pep Guardiola's men 3-1 in the 'Final Eight' in Lisbon with a late brace from substitute Moussa Dembele deciding the game after Kevin De Bruyne's goal had cancelled out Maxwel Cornet's opener.
Thomas Mueller and Philippe Coutinho both scored twice as the German double winners blew Barca away in a merciless display that will prompt serious questions over Lionel Messi's future in Spain.
PSG face Atalanta in Lisbon on Wednesday in the first quarter-final of the 'Final Eight', after UEFA turned the latter stages of Europe's elite club competition into something akin to a World Cup after the long coronavirus shutdown.
