Legend's all-time blunder sparks extraordinary quarter-final as Champions League final four confirmed

Manuel Neuer committed one of the all-time goalkeeping blunders after just 35 seconds to kick off an extraordinary Champions League clash between Bayern Munich and Real Madrid on Thursday (AEST).

The legendary German shot-stopper inexplicably gifted the ball to Madrid's Arda Guler - the Turkish star who will play against the Socceroos at the World Cup - under no real pressure.

Guler slotted the opportunity gratefully to score the first of seven goals on a wild night in Germany.

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Bayern won the quarter-final leg 4-3 to wrap up a 6-4 aggregate triumph and advance to a tasty semi-final showdown with holders Paris Saint-Germain.

The late turning point was the questionable sending off of Eduardo Camavinga, reducing the visitors to 10 men.

Luis Diaz and Michael Olise pounced to score and seize the tie for Bayern.

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The game ended in acrimony with Madrid's players furious that referee Slavko Vincic sent off Camavinga with a second yellow card for an innocuous looking foul on Harry Kane after being urged to do so by the Bayern players in the 86th minute.

Diaz fired inside the right post three minutes later and Olise ended the contest definitively with a shot in off the far post in stoppage time to give Bayern a win on aggregate after the Bavarian powerhouse won the first leg of their quarter-final 2-1 in Madrid last week.

"It's unbelievable that you send off a player for this action," Madrid manager Alvaro Arbeloa said of the Camavinga call.

"I can't believe that. It's not possible to be sent off for an action like this. We feel really angry and disappointed and all of this is hard for us."

In London, a 0-0 draw against Sporting was enough to send Arsenal through to a semi-final date with Atletico Madrid.

Arsenal won the first leg 1-0 in Porto last week.

It means a Premier League and Champions League double remains possible for Mikel Arteta's team, despite a slump in form in recent weeks.

Arsenal have never won the Champions League and only once reached the final.

But they are now just two games away from this year's showpiece in Budapest.

Kai Havertz's late winner in the first leg in Portugal last week proved to be decisive as Sporting failed to find a breakthrough in London.

It is the fourth time Arsenal has advanced to the semi-finals, having lost to eventual winner Paris Saint-Germain at that stage last season.

The result was the perfect way for Arsenal to start a crucial week in which it also plays Premier League title rival Manchester City on Monday (AEST).

There have been signs of the tension getting to Arteta's players as the season enters the closing stages, having lost the League Cup final against City and then crashing out of the FA Cup at the hands of second-division Southampton.

Defeat at home in the league against Bournemouth last weekend only added to the sense that Arsenal was faltering at a critical time.

But Arteta insisted there was "zero fear" ahead of the second leg against Lisbon and his team got the job done in another tight encounter between the two.

Substitute Leandro Trossard came closest to winning it for Arsenal on the night when heading against the post late on.

"Who cares what people think? All that matters is what this group thinks, what the manager thinks and we're in another semi-final. I'm delighted," Arsenal star Declan Rice said.

"You want to be able to score goals. Most teams that come here, we play against 5-4-1 every time so there's a bit of perspective with that. Every time we've played this season changes from a four to a five to defend against us so the spaces aren't there as much."