NAPOLI recovered from three goals down to draw 3-3 at Steaua Bucharest in the Europa League on Thursday as holder Atletico Madrid was held 1-1 by Bayer Leverkusen.
Juventus drew 1-1 at Manchester City and Italian teams, which failed to win in the opening round of games, produced a much better performance with Sampdoria and Palermo also claiming 1-0 home victories over Debrecen and Lausanne Sport, respectively.
Porto maintained its 100 percent record, sealing a 10th successive win by beating CSKA Sofia 1-0 away and Liverpool was held to a goalless draw at Utrecht.
Moldova's Sheriff Tiraspol provided the night's biggest upset with a 2-0 win over Ukraine's Dynamo Kiev.
Napoli made a disastrous start in Romania, falling 0-3 behind in only 16 minutes as Cristian Tanase, with a free kick, and Pantelis Kapetanos added to a second-minute own goal by Emilson Cribani, who deflected a shot into the net. But former European champion Steaua, in its first match under new coach Marius Lacatus, collapsed after Kapetanos was sent off in the 31st minute.
Luigi Vitali pulled one back just before the break and Steaua twice hit the woodwork before substitute Marek Hamsik reduced the arrears in the 73rd.
Napoli's Uruguay forward Edinson Cavani completed the fightback by snatching the equalizer in the eighth minute of stoppage time to give the Italian side its second draw in two Group K games.
Liverpool leads the group with four points after an uninspiring draw at Utrecht which has been involved in two goalless stalemates after its opening draw at Napoli.
Atletico, beaten by Aris Salonika in its first Group B game, fell behind to a goal from Swiss striker Eren Derdiyok six minutes before halftime at home to erratic Leverkusen.
Simao Sabrosa converted a penalty after the break to give Atletico its first point of the group, but the Spaniards are still bottom while Leverkusen leads with four points.
Juventus, amazingly held 3-3 at home by Poland's Lech Poznan, took an early lead at City through a Vincenzo Iaquinta strike. Adam Johnson leveled before halftime.
Poznan went top of the group, ahead of City on goals scored, with a 2-0 win over Austrian champion Salzburg.