Borussia Dortmund demolished Legia Warsaw in Poland as half-a-dozen different players found the net in a 6-0 Champions League rout.
Rampant Leicester marked their Champions League debut in stunning style as they thrashed Club Brugge 3-0.
Tottenham's Champions League campaign began in disappointment as an English club-record home crowd watched them beaten 2-1 by Monaco at Wembley.
Sergio Aguero scored his second hat trick of the season as Manchester City overpowered Borussia Monchengladbach 4-0 in their delayed Champions League Group C opener.
Juventus were frustrated by a stubborn Sevilla side in Turin as the 2015 Champions League finalists started this year's campaign with a 0-0 draw.
Substitute Alvaro Morata struck deep into injury-time to seal a stunning Champions League comeback for holders Real Madrid at the Bernabeu on Wednesday night.
Lionel Messi helped give Celtic another harsh Champions League lesson with a hat trick as Barcelona thrashed the Hoops 7-0 in their Group C opener at the Nou Camp.
Midfielder Joshua Kimmich continued his goal rush as he claimed a double in Bayern Munich's 5-0 Champions League demolition of FC Rostov.
Manchester City's Champions League game against Borussia Monchengladbach, postponed because of torrential rain, will be played on Wednesday evening at 7:45 p.m. BST.
Atletico Madrid's bid to reach a third Champions League final in four years got off to a winning start with a hard-fought 1-0 victory over PSV Eindhoven.
Arkadiusz Milik was Napoli's hero as they came from behind to beat 10-man Dynamo Kiev 2-1 in Ukraine.
Alexis Sanchez scored in the second half to help Arsenal salvage a 1-1 draw at Paris Saint-Germain, who were left to rue multiple missed chances after scoring in the first minute of their Champions League opener.
Pep Guardiola will return to the Camp Nou after Manchester City and Barcelona were drawn together in the Champions League group stage on Thursday.
Manchester City sealed their place in the Champions League group stage with a comfortable 6-0 aggregate victory over Steaua Bucharest in the playoff round on Wednesday night, and will be in pot 2 for Thursday's draw.
Rostov eliminated Ajax to reach the group stage with a 4-1 rout to claim a 5-2 aggregate win overall.
Joe Hart was hailed by supporters as Manchester City went through the motions to claim their place in the Champions League group stage at Steaua Bucharest's expense.
Roma crashed out of the Champions League before the group stage following two more red cards in a 3-0 home defeat to Porto on Tuesday.
Celtic reached the Champions League group stage for the first time in three years, but only after an enormous scare in Israel.
Celtic's Champions League dream moved closer to reality with a 5-2 win over Hapoel Be'er Sheva at Parkhead but not before the home fans suffered a brief nightmare.
Porto and Roma played out a 1-1 draw in the final qualifying round of the Champions League to set up a tense second meeting on Aug. 23.
Sergio Aguero scored a hat trick as Manchester City made light work of Steaua Bucharest by winning 5-0 in Romania to put one foot in the Champions League group stage.
Dani Carvajal was the hero as he fired Real Madrid to a 3-2 victory in the UEFA Super Cup over 10-man Sevilla with a brilliant extra-time winner.
Pep Guardiola faces a trip to Romania as Manchester City take on Steaua Bucharest in the final qualifying round of the Champions League.
Shakhtar Donetsk, Olympiakos and Fenerbahce all crashed out of the UEFA Champions League in the third qualifying round on Wednesday, while Monaco, Ajax and Celtic got through to the playoff round.
Ireland's Dundalk progressed to the Champions League's playoff stages after a 3-1 aggregate defeat of BATE Borisov -- securing European group-stage football this season.
Leigh Griffiths' 78th minute strike gave Celtic a 1-1 draw against FC Astana and put the Hoops firmly in charge of their Champions League destiny.
Shakhtar Donetsk began their Champions League campaign with a 2-0 win over Young Boys in the third qualifying round on Tuesday.
Celtic put part-time Lincoln Red Imps in their place with a 3-0 Parkhead win that set up a Champions League third-round qualifying meeting with Astana.
Ties are to be played on July 26 or 27 and August 2 or 3.
Brendan Rodgers' first game as Celtic boss ended in a humiliating 1-0 defeat to Gibraltar's Lincoln Red Imps in the first leg of their second round Champions League qualifier on Tuesday.
Atletico Madrid finally got their own back on Real Madrid in European competition by snatching a 4-2 win over their city rivals after extra time to lift the UEFA Super Cup on Wednesday.
AEK Athens and PAOK Thessaloniki gave Greek football fans plenty to cheer about as both clubs reached the Champions League playoff round and joined three former winners of Europe's elite club competition on Tuesday.
Odsonne Edouard scored a brace to help Celtic to a 3-1 victory in the first-leg of their Champions League second round qualifying tie with Rosenborg in Glasgow.
Liverpool boss Jurgen Klopp believes Mo Salah is likely to miss the World Cup after leaving the Champions League final injured in the first half.
Gareth Bale said he wants to be playing every week -- which "has not happened this season" -- after leading Real Madrid to the Champions League trophy in Saturday's 3-1 win over Liverpool.
Cristiano Ronaldo cast doubt over his future with Real Madrid after they won the Champions League for the third consecutive season on Saturday in a 3-1 win over Liverpool.
Real Madrid beat Liverpool 3-1 to win the Champions League for a third successive season thanks to a spectacular two-goal substitute appearance from Gareth Bale and a performance to forget for Loris Karius.
Liverpool set up a repeat of their 1981 meeting against Real Madrid despite a first Champions League defeat of the season at the Stadio Olimpico.
Two goals from Karim Benzema helped Real Madrid advance to their third straight Champions League final 4-3 on aggregate after a scintillating 2-2 draw with Bayern Munich in the second leg of their last-four clash on Tuesday.
Real Madrid will be firm favourites to reach another Champions League final after winning 2-1 away to Bayern Munich in the first leg of their semifinal.
Liverpool scored five but conceded two late goals as Roma gave themselves a glimmer of hope in a 5-2 defeat at Anfield after the home side had swept into a huge lead.
Liverpool will face Roma in the semifinals of the Champions League later this month as they continue their attempt to win it for the first time since 2005.
Cristiano Ronaldo scored an injury-time penalty to book Real Madrid's place in the Champions League semifinals after losing the second leg 3-1, but winning the tie 4-3 on aggregate.
Bayern Munich are through to the Champions League semifinals for the seventh time in nine years after a 0-0 draw in their quarterfinal second leg with Sevilla.
Barcelona suffered a shock Champions League defeat at the hands of Roma, losing 3-0 in their quarterfinal second leg at the Stadio Olimpico to go out 4-4 on aggregate thanks to an away goal for the Serie A side in the first leg.
Mohamed Salah and Roberto Firmino scored second-half goals as Liverpool won 2-1 at Manchester City to reach the Champions League semifinals 5-1 on aggregate.
A pair of own goals helped Barcelona take a major step toward the Champions League semifinals with a 4-1 win over Roma at the Camp Nou on Wednesday.
Liverpool drew significant first blood in their all-English Champions League quarterfinal as Manchester City were blown away in 45 minutes in a raucous 3-0 Anfield defeat.
Bayern Munich fought back from a goal down to beat Sevilla 2-1 in their Champions League quarterfinal first leg on Tuesday night at the Ramon Sanchez Pizjuan.
Cristiano Ronaldo scored a spectacular brace to hand Real Madrid a 3-0 victory over Juventus in their Champions League quarterfinal first leg on Tuesday.
Liverpool face Manchester City in an all-English Champions League quarterfinal after the draw in Switzerland on Friday.
Two goals from Lionel Messi -- one the fastest of his career and the other his 100th in the Champions League -- helped Barcelona beat Chelsea 3-0 at the Camp Nou and advance to the quarterfinals 4-1 on aggregate.
Bayern Munich coasted into the quarterfinals of the Champions League with a 3-1 win over Besiktas in Istanbul to complete an 8-1 aggregate win.
A second-half strike from Edin Dzeko sent Roma into the quarterfinals of the Champions League with a 1-0 home victory against 10-man Shakhtar Donetsk.
Sevilla are through to the Champions League quarterfinals after beating Manchester United 2-1 in their second leg at Old Trafford on Tuesday night.
Manchester City slipped to their first home defeat since December 2016 as Basel won the second leg of their Champions League last-16 tie 2-1.
Two goals in under three second-half minutes saw Juventus come back from 1-0 down to knock Tottenham Hotspur out of the Champions League, with a 2-1 win at Wembley putting them through to the quarterfinals 4-3 on aggregate.
Liverpool eased into the quarterfinals of the Champions League for the first time in nine years with no great alarm in a lifeless goalless draw at home to Porto.
Holders Real Madrid eased into the Champions League quarterfinals with a 2-1 win at 10-man Paris Saint-Germain.
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.