How many goals do Bayern Munich need to score tonight against Barcelona to progress to the Champions League final in Berlin?

All the permutations are here

Bayern Munich manager Pep Guardiola (GETTY IMAGES)

Pep Guardiola's side trailed Barcelona 3-0 going into their semi-final second leg.

Trailing from the first leg, the Bundesliga giants now have a mountain to climb in order to make the final in the German capital next month. But then again, football is a funny old game.

Ahead of kick-off in Munich, the math is simple: Bayern need four goals without reply.

It's hardly worth dusting down your abacus to work that one out, but what if things were to get interesting in the Allianz Arena ?

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Here are some of the potential scorelines that will see Bayern Munich reach June's Champions League final in Berlin:

• Bayern Munich 4-0 Barcelona (Bayern win 4-3 on aggregate)
• Bayern Munich 5-1 Barcelona (Bayern win 5-4 on aggregate)
• Bayern Munich 6-2 Barcelona (Bayern win 6-5 on aggregate)
• Bayern Munich 7-3 Barcelona (Bayern win 7-6 on aggregate)

And so on.

On his link with Manchester City, Bayern manager Pep Guardiola said yesterday:

“I have said it 200 million times. I have one more year left on my contract and I will remain here next season,” he said, attempting to end the lingering hopes he would take charge of City this summer. “I didn’t come here as ‘the best trainer in the world’,” he added. “That is so much crap.

“From the beginning here in Munich I did my very best. I hope it is enough for the players, for the fans, for the legends of Bayern Munich and for the journalists and, if not, I am sorry. It was a dream when Bayern Munich asked me to come here.

“I have won everything in Barcelona and won plenty here but it was down to the players. I won everything in Barcelona because I had this super team full of great players. Last year in Munich I won almost everything but that, too, was down to the players. I am a good trainer for my team – that is all.”