Shakhtar Donetsk stunned Napoli 2-1 at Metalist Stadium thanks to goals from Taison and Facundo Ferreyra.
Besiktas started their Champions League Group G campaign with a 3-1 win against Porto at the Estadio do Dragao.
Maribor and Spartak Moscow played out a 1-1 draw in their Champions League Group E opener as a referee narrowly escaped being hit by a flare.
Cristiano Ronaldo scored twice to help Real Madrid open their Champions League campaign with a 3-0 win over Apoel on Wednesday.
Lionel Messi summoned another mesmerising performance as Barcelona breezed to a 3-0 win over Juventus in their UEFA Champions League Group D opener at the Camp Nou.
Chelsea marked their Champions League return with a 6-0 Group C rout of Azerbaijan's Qarabag, but sterner tests await.
Free-spending Paris St Germain demonstrated their prowess with a 5-0 thumping of Celtic in their Champions League opener at Parkhead.
Saul Niguez squandered a gilt-edged chance to snatch Champions League victory at the death as Atletico Madrid had to make do with a goalless draw against Roma.
CSKA Moscow forward Timur Zhamaletdinov made a memorable Champions League debut on Tuesday by scoring the winner in a 2-1 comeback victory at Benfica in Group A.
Five-time champions Bayern Munich opened their Champions League campaign with a flattering 3-0 win over 10-man Anderlecht on Tuesday.
Olympiakos conceded a goal after just 69 seconds of their Champions League campaign and went on to lose 3-2 to Sporting Lisbon at home in Group D on Tuesday.
Manchester United eased back into Champions League life as Marouane Fellaini, Romelu Lukaku and Marcus Rashford put Basle to the sword.
Barcelona and Juventus will renew their recent rivalry when they meet at the Camp Nou in the group stage of the UEFA Champions League on Tuesday.
Real Madrid's Cristiano Ronaldo was named UEFA's Player of the Year, beating Lionel Messi and Gianluigi Buffon to the prize.
Champions League holders Real Madrid will face Borussia Dortmund and Tottenham in a difficult group following the draw ceremony in Monaco on Thursday.
The 32 teams in this season's Champions League group stage can now begin to think about their dream draw after the final seeding pots were confirmed following Wednesday's final qualifying ties.
Liverpool scored three times in a devastating opening 21 minutes as they reached the Champions League group stage with a 6-3 aggregate win over Bundesliga side Hoffenheim at Anfield.
Celtic progressed into the Champions League group stage as expected with an 8-4 aggregate win over Astana, but they were made to sweat in their 4-3 second-leg defeat in Kazakhstan.
Second-half goals from Jose Callejon and Lorenzo Insigne earned Napoli a 2-0 win in Nice and ensured their qualification for the Champions League group stages.
Goals from Dries Mertens and Jorginho were enough to earn Napoli a 2-0 win against Nice in their Champions League qualifying play-off first leg.
Celtic put one foot into the Champions League group stages with a 5-0 thumping of Astana in the first leg of their playoff at Parkhead.
Trent Alexander-Arnold scored his first Liverpool goal as Jurgen Klopp's side took a 2-1 lead in their Champions League qualifier against Hoffenheim.
With a new season in the champions league on the horizon, a lot of people are already putting together their predictions for exactly what is going to happen.
Manchester United were outclassed at times as Real Madrid won the UEFA Super Cup to give Jose Mourinho food for thought at the start of his second season in the hot seat.
Liverpool will have to overcome Hoffenheim in a two-legged playoff to reach the group stages of the Champions League.
James Forrest's second-half strike gave Celtic a 1-0 win over Rosenborg and took the Hoops another step closer towards Champions League football.
Ajax failed to make it through to the Champions League qualifiers for the third consecutive year on Wednesday when they were eliminated on the away goals rule 3-3 on aggregate after a 2-2 home draw against Ligue 1 side Nice.
Mario Balotelli's first-half goal was only enough for Nice to earn a 1-1 draw against Ajax in the first leg of their Champions League third qualifying round match on Wednesday.
Olympiakos opened their Champions League campaign with a 3-1 win away to Partizan Belgrade in the third qualifying round on Tuesday.
Juventus goalkeeper Gianluigi Buffon said he was hugely disappointed after his side crumbled in the second half to lose 4-1 to Real Madrid in the Champions League final.
David De Gea's exceptional display saved Manchester United's blushes as Jose Mourinho's men somehow escaped with a goalless draw from a match dominated by Sevilla.
Shakhtar Donetsk pulled off a second-half comeback to beat Roma 2-1 in their Champions League round-of-16 first leg in Ukraine on Wednesday night.
Bayern Munich look assured of a Champions League quarterfinal spot for a seventh straight season after thrashing 10-man Besiktas 5-0 in Germany.
Lionel Messi broke his goal duck against Chelsea to deny Antonio Conte's side a crucial lead over Barcelona in their Champions League showdown.
Sadio Mane scored a hat trick and Mohamed Salah continued his phenomenal run with a 30th goal of the season as Liverpool won 5-0 at Porto to virtually assure themselves a Champions League quarterfinal place.
Cristiano Ronaldo scored twice and Marcelo got another as Real Madrid came from a goal down to take a 3-1 lead over Paris Saint-Germain in the first leg of their Champions League clash at the Bernabeu.
Ilkay Gundogan scored twice as Manchester City put one foot in the Champions League quarterfinals with an emphatic 4-0 win over Basel.
Christian Eriksen completed a remarkable Tottenham comeback as they rallied from two down to draw with Juventus in the Champions League last 16.
Cristiano Ronaldo scored from a free kick to help Real Madrid beat Gremio 1-0 and claim the Club World Cup in Saturday's final in Abu Dhabi.
Gareth Bale was the surprise hero as Real Madrid survived a shock against outsiders Al Jazira to win 2-1 in Wednesday's extra dramatic Club World Cup semifinal in Abu Dhabi.
Reigning champions Real Madrid will face Paris Saint-Germain in the Champions League round of 16, while Chelsea take on Barcelona.
Real Madrid star Cristiano Ronaldo won the fifth Ballon d'Or of his career on Thursday, matching Lionel Messi as the most-awarded winner of one of the sport's top individual honours.
A scintillating display of football from Liverpool's Fab Four saw Jurgen Klopp's side blaze their way into the Champions League knockout phase with a 7-0 victory over Spartak Moscow.
Manchester City slumped to their first defeat of the season with a 2-1 loss to Shakhtar Donetsk in their final Champions League Group F game.
Fernando Llorente and Georges-Kevin Nkoudou scored their first goals for Tottenham goal as Spurs strolled into the Champions League round of 16 by beating Apoel Nicosia.
Cristiano Ronaldo became the first player to score in every Champions League group stage match as Real Madrid beat Borussia Dortmund 3-2 at the Bernabeu.
Feyenoord finally secured their first points in Champions League Group F, rallying from a goal down to beat Napoli 2-1 on Wednesday, costing the Serie A side a spot in the round of 16.
Sevilla qualified for the round of 16 of the Champions League with a 1-1 draw at Maribor on Wednesday.
Ten-man Porto advanced out of Group G with a 5-2 defeat of a disappointing Monaco side, who also went down a man at the Estadio do Dragao.
RB Leipzig's Champions League debut ended in a 2-1 home loss to Group G winner Besiktas on Wednesday.
Bayern Munich got a little payback against Paris Saint-Germain with a 3-1 win at the Allianz Arena on Tuesday night in Group B.
Juventus secured their place in the round of 16 of the Champions League with a 2-0 victory against Olympiakos in Greece.
Barcelona completed their Champions League Group D campaign with a 2-0 win over Sporting Lisbon at the Camp Nou.
Manchester United came from behind to beat CSKA Moscow and top their Champions League group as Jose Mourinho's men took their unbeaten home run to a club record-equalling 40th match.
Chelsea missed a chance to finish top of Champions League Group C after a 1-1 draw at home to Atletico Madrid, who will settle for a Europa League spot.
Roma progressed to the Champions League knockout stage as Group C winners after beating Qarabag 1-0 on Tuesday.
Celtic will be playing European football after Christmas despite a 1-0 Champions League defeat by Anderlecht at Parkhead.
Lionel Messi started on the bench as Barcelona secured their passage into the round of 16 of the Champions League with a 0-0 draw at Juventus.
Corentin Tolisso set up one goal and scored another to give Bayern Munich a 2-1 win over Anderlecht on Wednesday in Group B of the Champions League.
Manchester United were denied a place in the Champions League knockout phase as Michael Lang's late strike secured Basel a memorable, and deserved, victory.