A controversial Radamel Falcao effort gave Porto a 2-1 win over Arsenal in their Champions League last-16 first leg but the English side will take heart from Sol Campbell's away goal on his return to the tournament after four years.
Chelsea, Valencia and Lazio shook things up in England, Spain and Italy by climbing to the top of their respective leagues.
Arsenal defender Thomas Vermaelen suffered a suspected broken leg during the goalless draw at Aston Villa in the Premier League on Wednesday.
Arsenal's future looks to be in safe hands after a largely teenage side produced a sparkling display to thrash Championship (second division) Sheffield United 6-0 in the third round of the League Cup on Tuesday. Manchester United needed two late goals to beat 10-man Middlesbrough 3-1.
France defender William Gallas scored two minutes from time to salvage a 1-1 draw for Arsenal against Dynamo Kiev in their Champions League tie on Wednesday.
Injured Dutch striker Robin van Persie's hopes of being fit for the World Cup took a nosedive when Arsenal said he could be out of action until May. Netherlands start their World Cup campaign in South Africa with a Group E tie against Denmark on June 14.
France playmaker Samir Nasri has agreed to join Arsenal from Olympique Marseille, the English Premier League club said on Friday. Nasri, who will join up with the rest of the Arsenal squad for pre-season training on July 21, made two substitute appearances for France at Euro 2008 and has 12 caps in total.
Croatia striker Eduardo has signed a new long-term contract with Arsenal, the Premier League club said on Wednesday.
FA details Mourinho's expletive-laden rant at West Ham
Petr Cech will return in goal for Arsenal at HullCity on Saturday after missing the 1-1 Champions League draw at Paris St Germain in midweek.
Tottenham Hotspur reached the League Cup final after an emphatic 5-1 victory over Arsenal.
Arsenal resume battle with Manchester United at the top of the Premier League on Saturday.
Arsenal skipper and playmaker Cesc Fabregas will be out with a medial knee ligament injury for up to four months, Arsenal manager Arsene Wenger told reporters on Tuesday. The 21-year-old Spaniard, who was named Arsenal captain in place of William Gallas a month ago, was injured in a 50-50 challenge with Spanish team mate Xabi Alonso during Arsenal's 1-1 draw with Liverpool.
Arsenal skipper and playmaker Cesc Fabregas will be out with a medial knee ligament injury for up to four months, Arsenal manager Arsene Wenger told reporters on Tuesday.
Arsenal striker Alexis Sanchez and playmaker Mesut Ozil are fit for Sunday's Premier League clash with Chelsea, manager Arsene Wenger said. The league leaders have been without the influential Chilean, who has scored six league goals this season, since late November after he suffered a hamstring injury. Ozil missed Sunday's goalless draw away at Stoke City with a minor toe injury. "The good news is that Ozil certainly will be available, and Sanchez ... the next two days will be decisive ... but I think this time he will make it to be available for selection," Wenger told reporters on Thursday.
Porto beat an under-strength Arsenal side 2-0 on Wednesday to clinch top spot in Group G of the Champions League. With the two teams already guaranteed a place in the first knockout round, Arsenal manager Arsene Wenger, in his 700th game in charge of the London side, rested several first choice players and chose to field young reserves instead.
The career milestones of the France international and outgoing Arsenal captain
rare header by Cesc Fabregas in injury time earned Arsenal a 1-1 draw at Sunderland on Saturday after the home side had seemed on course for an upset win when they took the lead in the 86th minute.
Adebayor, who was also fined 7,500 pounds ($14,490) by an FA disciplinary commission hearing, was found guilty of a charge of reacting aggressively and failing to leave the field of play immediately after being dismissed.
The France striker, who damaged stomach and groin muscles in his team's Champions League exit to PSV Eindhoven on Wednesday, should be ready for next season, Arsenal said.
Hull City secured a stunning 2-1 win at Arsenal in the English Premier League on Saturday thanks to a header by Daniel Cousin that ruined Arsene Wenger's 12th anniversary as manager of the north London side. It was only Arsenal's second defeat in 60 matches at the Emirates Stadium and meant they tumbled from first place at the start of the day into fourth spot. Hull, who are playing in the top division for the first time, are sixth.
News of all that's transpired on and off the football field
Arsenal did not include one Englishman in their 16-man squad that demolished Crystal Palace 5-1 on Monday.
Claudio Ranieri was named the League Managers' Association (LMA) manager of the year on Monday after leading 5,000-1 outsiders LeicesterCity to an improbable Premier League title.
Substitute Marlon Harewood struck two minutes from time to hand West Ham United a 1-0 win over Arsenal at Upton Park on Sunday.
England striker Danny Welbeck sustained a knee injury in Arsenal's Premier League match at Manchester City on Sunday, raising doubts about his availability for next month's European Championship.
Arsenal skipper Cesc Fabregas has admitted that he only stayed back at the club because he was given no choice.
It was an all too familiar sight for Arsene Wenger as Arsenal threw away a lead to lose 2-1 at Swansea City on Sunday and the Frenchman acknowledged his flaky team are becoming a cause for concern.
Chelsea resume their quest to derail the domestic title charge of Arsene Wenger's team this weekend with a match against Middlesbrough.
A second-string Arsenal side proved strong enough to secure a 2-0 victory at Championship club Burnley on Sunday and with it a place in Monday's FA Cup fourth-round draw.
Thierry Henry salvaged a 1-1 draw for Arsenal against Tottenham Hotspur in a final north London derby
Arsenal, Olympique Lyon and Villarreal try to venture into the unknown this week when the second legs of the Champions League quarter-finals take place.
Real Madrid president is targeting seven high-profile coaches for the Spanish club