Manchester United's woes deepened as stunning goals by Moussa Sow and Jeremain Lens gave Fenerbahce a 2-1 Europa League win on Thursday that left Jose Mourinho's side facing a battle to reach the knockout stages.
Robert Lewandowski struck twice in the first half as holders Bayern Munich cruised past Schalke 04 3-0 on Wednesday to reach the German Cup semi-finals.
A summary of Wednesday's matches in the UEFA Champions League.
Four-time European Champions Ajax Amsterdam were felled at the first hurdle of the continent's second tier Europa League on Thursday, exiting in the group stage two days after rivals PSV Eindhoven celebrated long-awaited success.
Inter Milan went on a rare scoring spree to thrash Serie A newcomers Frosinone 4-0 and go clear at the top on Sunday, the first time Roberto Mancini's team have won a league match by more than one goal this season.
Lazio thumped Empoli 4-0, their eighth successive league win, to go second in Serie A on Sunday and Napoli ended their dismal run with a 3-0 win over Fiorentina despite being denied a clear goal.
News of all that's transpired on and off the football field.
AC Milan youth players subjected to alleged racist abuse; Argentine fan punches player.
News of all that's transpired on and off the football field
Ruthless Bayern Munich scored five goals in the first 35 minutes on the way to a 7-1 demolition of AS Roma on Tuesday which bore an uncanny resemblance to Germany's win over Brazil by the same score in the World Cup semi-final.
News of all that's transpired on and off the football field
Genoa handed Serie A leaders and titleholders Juventus a dramatic first league defeat of the season when Luca Antonini scored in the fourth minute of stoppage time to give them a 1-0 win on Wednesday.
Undefeated Bayern Munich stumbled to a 0-0 draw at Borussia Moenchengladbach on Sunday that ended a four-game winning streak in the league but they remain four points clear at the top.
Inter Milan earned a 2-0 victory over Livorno thanks to a howler from visiting goalkeeper Francesco Bardi, who is on loan from the San Siro club, and a late Yuto Nagatomo strike in Serie A on Saturday.
This and more from the happenings in the world of football.
Brazil playmaker Kaka scored his first goal, a delightful curling shot, since his return to AC Milan at the start of the season but his struggling team were held 1-1 at home by Lazio in Serie A on Wednesday.
A round-up of the top-flight football matches played across Italy and Germany on Sunday
A beautifully-worked Antonio Di Natale goal saw lowly Udinese beat AC Milan 1-0 in Serie A on Saturday to deal a huge blow to the visitors' prospects of European football next season.
AC Milan manager Massimiliano Allegri has hit back at claims from the mayor of Verona that Mario Balotelli is a troublemaker, saying the problem of racism lies with supporters not the Italy attacker.
Lazio squandered a two-goal lead against Inter Milan as they drew 2-2 at the San Siro on Sunday and wasted a golden chance to take sole possession of third spot in Serie A.
Two goals in three devastating second-half minutes helped Napoli reach the Italian Cup final on Wednesday with a 3-0 win over AS Roma in the second leg of their semi-final in Naples, to clinch the tie 5-3 on aggregate.
Carlos Tevez scored two early goals for Juventus before the Serie A leaders squandered the lead in a 2-2 draw at Verona on Sunday.
Napoli booked a clash with AS Roma in the Italian Cup semi-finals after a late instinctive Gonzalo Higuain backheel lifted Rafael Benitez's side to a 1-0 win over Lazio on Wednesday.
Lopetegui blends youth and experience in Spain World Cup squad
Decision to sack Claudio Ranieri nine months after he led Leicester City to a historic title widely criticised.
Lionel Messi set a new Champions League scoring record with a hat-trick and Luis Suarez netted his first in Barcelona colours as the Spaniards comprehensively beat APOEL Nicosia 4-0 in the Champions League on Tuesday.
Champions Juventus continued their resurgence by beating Hellas Verona 3-0 at home for an eighth successive Serie A victory as Inter Milan remained top after winning 1-0 at Empoli.
Bundesliga leaders Bayern Munich face Borussia Dortmund on Saturday with relations between the German heavyweights seemingly at an all-time low.
Juventus will end 2013 five points clear at the top of Serie A after a 4-1 victory at Atalanta stretched their winning league run to nine games on Sunday.
With Liverpool still to visit Chelsea, who trail them by nine points with two games in hand, Juergen Klopp's side may have to beat Brighton & Hove Albion on May 13 and rely on their superior goal difference to qualify for the Champions League, assuming they do not secure it by winning this year's trophy.
Two goals in three minutes from Napoli's Goran Pandev were not enough to secure victory as his side threw away a two-goal lead to draw 3-3 at home to Udinese in an end-to-end Serie A thriller on Saturday.
Gonzalo Higuain netted twice, the first a superb individual effort, to give Napoli a 4-2 win at Lazio while Fiorentina beat Hellas Verona 4-3 in a Serie A scoring spree on Monday.
When Juventus coach Massimiliano Allegri was greeted with a hail of eggs and spat at on his first day at work he could not have imagined he would lead them to the brink of an unprecedented treble of titles in his first season.
Check out the top footballers of the weekend...
Barcelona's Lionel Messi rescued a 1-1 draw at Villarreal with a sensational late free-kick on Sunday but could not prevent the champions finishing the weekend third in La Liga, five points behind leaders Real Madrid.
Three time European champions Inter Milan were stunned 2-0 at home by Israeli side Hapoel Beer-Sheva and Manchester United were floored by a late goal from Feyenoord as the Europa League group stage got underway on Thursday.
The enduring image of Luis Enrique for many soccer fans is the Spain player with blood gushing from his nose after a vicious elbow from Italy defender Mauro Tassotti during the 1994 World Cup quarter-final in Boston.
World No 1 Novak Djokovic maintained his perfect tournament record and advanced to his fifth China Open final with a 6-3, 6-4 victory against Andy Murray on Saturday.
Leicester's Mahrez finds form in time for January sales
A round-up of all football-related news...