The Germans, leading 2-1 from the first leg, were second best for long periods of the game and had looked to be on their way out of the competition when Juan Vargas and Stevan Jovetic scored the game's opening two goals to put the hosts ahead in the tie for the first time.

But Jovetic's strike sparked a manic 11-minute period during which four goals were scored and Bayern took an unlikely grip on the game.

Van Bommel levelled the tie with a low drive on the hour only for Jovetic to score his second four minutes later.

By Vincent Lai

Goals from Samir Nasri, Emmanuel Eboue and a hat-trick from Nicklas Bendtder did the trick for the Gunners, as they wiped out Porto's 2-1 first leg lead to win with a 6-2 aggregate score.

Here's how the individual players from each team performed:

The Gunners were trailing 2-1 from the first leg and had to do without injured captain Cesc Fabregas.

However, Arsene Wenger's young team rose to the challenge as a first-half brace from Bendtner - who missed a string of chances against Burnley here three days ago - was followed by fine goals from Samir Nasri and Emmanuel Eboue before the young Dane slotted home a penalty in the final minute to secure a place among the last eight of Europe's elite once again.

The result also broke Arsenal's unwelcome near 32-year run of failing to overturn a first-leg deficit in a European tie since beating Hajduk Split in 1978.

This was the striker's first hat-trick for Arsenal.

The Dane was derided for a performance against Burnley on Saturday in which he missed a sackful of chances, but he made amends in style as Arsenal claimed a 6-2 aggregate win to book their quarter-final place.

Asked if Saturday had played on his mind, he told Sky Sports 2: "Not at all. Every time I play a game I put it behind me as soon as it's finished.

"Sometimes it's one of those days and today I put it right.

"I'm happy with my hat-trick but tomorrow we move on."

The Portuguese side lead 2-1 from the first leg, which they won after a highly-controversial quick free-kick.

Porto have lost all six of their trips to London - including a 1-0 loss at Chelsea in this season's group stage - and went down 4-0 to the Gunners during September 2008.

However, Ferreira believes tomorrow night's encounter, in which Arsenal must do without injured captain Cesc Fabregas, will be different.

Porto have plenty of options in attack - with Colombia forward Falcao, Argentinian Marian Gonzalez, Uruguay's Cristian Rodriguez and Brazil international Hulk all pressing to be included in the three-man frontline.