In Group F, Barcelona slumped to a shock home 2-1 defeat to Russian minnows Rubin Kazan while Italian side Inter Milan came twice from behind to draw with Dynamo
Kiev.
Sevilla (barely) have Real Madrid and Barcelona in sight; Manchester United go top as Chelsea slump to their first defeat of the season; Sampdoria teach Inter Milan a lesson in humility; and Bayern Munich stumble in Hamburg.
Sampdoria didn't take long to recover from their defeat by Fiorentina on Wednesday with a 1-0 victory over title holders Inter Milan. A goal from Giampaolo Pazzini (photo) gets Sampdoria back to the top of Serie A.
The first major clash of the Champions League failed to yield a goal as Inter and Barcelona cancelled each other out in Milan. Elsewhere, Arsenal fought back to win 3-2 away to Standard Liège and Liverpool edged Debrecen with a narrow 1-0 win.
The first major clash of this year's Champions League takes place at Milan's San Siro stadium where hosts Inter receive Spanish title holders Barcelona after swapping strikers Samuel Eto'o (left) and Zlatan Ibrahimovic (right) this summer.
For the group stages of the Champions League, title holder Barcelona is to face Inter Milan in group F while the group C line-up - which includes French team Bordeaux - promises a clash between Real Madrid and AC Milan.
Netherlands international midfielder Wesley Sneijder is fully focused on his new club after agreeing a move to Inter Milan from Real Madrid. Sneijder claims his treatment at the Madrid superclub "was really bizarre".
Inter Milan's outspoken coach, Jose Mourinho, has been strongly criticised by an Italian Muslim leader after he suggested the Ramadan fasting had affected the performance of one of his players.
As planned, Monday saw Sweden's Zlatan Ibrahimovic (pictured) moving from Inter Milan to Barcelona and Cameroon's Samuel Eto'o making the opposite move, in a swap deal said to be worth more than 66 million euros.
Former French international Patrick Vieira could leave Inter Milan for a shock move to Tottenham Hotspurs, says Spurs manager Harry Redknapp. Vieira is reportedly looking for regular first-team football after falling out of favour at Inter Milan.
