Paul Forrest: Bayern winning 2-0 is far from unrealistic.

Walter Keyleo: If I was Porto's manager I would park the bus and play a 7-3-0 formation tonight.

Robbie Thomson: Porto are a fantastic example of how to run a club.

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Sticking with the recent stats theme, it's perhaps no surprise that Bayern have made the most passes in this season's competition, share the top pass completion award so far (91%) and they also rank highest for possession, 63% - the same as Barcelona, their manager's old club.

Image source, AP

Considering the trophies Pep Guardiola has won at Bayern and the style of play he has developed, it's crazy to think the German giants are even fielding questions about their manager's future. But they are.

Honorary president and all-round footballing legend Franz Beckenbauer is reported to have told German newspaper Bild: "Has Guardiola failed? No. I think it would be too drastic to make such a claim.

"Of course, you have to be on top of your game in the knockout stages of the Champions League. We have failed to do just that in three out of four games.

"Bayern were beaten twice by Real Madrid last year. We have not forgotten about the 4-0 loss yet. Not a single Bayern player reached his usual level against Porto. But I can say one thing and that is that I still have complete faith in Guardiola, even if the situation is quite tricky."

Paul Gibbons: Would be interesting to see how Pep would cope building a team of his own rather than inheriting ready made squads.

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Perhaps my favourite Porto stat of the lot is that nobody else has scored more Champions League goals from outside the area this season. They've smashed in eight raspers in total. You have been warned, Manuel Neuer.

Twice winners Porto have not reached the last four since winning the trophy in 2004, but they are unbeaten in this season's competition. Alongside Bayern, they top the 'average goals a game' table with 2.67 while their overall goal difference in the tournament is the best (+18). The real deal, basically.

Come on Gary, we all know Bayern's C team would beat most Premier League clubs.

Gary Jhooti: Bayern had their C team out in the first leg.

Harry Brown: Bayern can pull it back. They are at home and have an away goal.

Patrick Marche: Given the players Porto have lost even since Andre Villas-Boas, it's remarkable. Beto, Otamendi, Guarin, Defour, Moutinho, Falcao, Hulk, Varela to name a few.

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How are both sides doing domestically this season? Very well, in case you didn't know.

Bayern won again at the weekend to go within two wins of another Bundesliga title, while Porto are second in their respective league, three points behind Benfica. That title race looks to be going down to the wire.

It's a big night in the Football League with one match in the Championship, five in League One and one in League Two - with something at stake in almost every fixture.

Millwall, in the Championship relegation zone, visit Blackburn knowing that a victory will take them to within a point of Rotherham, who still face a possible three-point deduction.

Promotion rivals Preston and MK Dons are both in action in League One. Preston, one point ahead of the Buckinghamshire side, travel to Notts County, who are two points adrift of safety, while the free-scoring Dons host mid-table Doncaster. Meanwhile Leyton Orient can climb out of the relegation zone with a win at Rochdale - a result which would end the hosts' slim play-off hopes.

It's free entry for the only game of the night in League Two - and the fans are in for a thriller as fourth-placed Bury entertain fifth-placed Southend. A win will put automatic promotion into Bury's hands, as they will move a point ahead of Wycombe in third place with two games remaining.

BBC Radio 5 live's Pat Nevin at Allianz Arena

"Bayern have goals in their team but do they have enough pace without the injured Franck Ribery and Arjen Robben? This was a night made for those two as Porto have had to change their two full-backs.

"I'm sure Pep Guardiola will have a really good plan in his head. It will involve a lot of Mario Gotze - he's a great creative influence. If they can take a chance early, they become the big favourites. But it's still in the balance as it stands."

Listen to BBC Radio 5 live commentary from 19:45 BST in this page.

BBC Sport's Simon Stone: "It could be a significant evening for FC United of Manchester.

"Ten years after the club was formed by fans disillusioned after the Glazer family's takeover of Manchester United, FC United only need to beat Stourbridge in their Evo-Stik Premier League game to confirm promotion to Conference North, tier six of the football pyramid.

"It would be the fourth promotion in the club's history in a game that will be their last 'on the road'.

"Since their formation, FC United have played at a variety of grounds but the supporter-owned club are due to open their purpose-built stadium, which fans have raised a significant proportion of the £6.5m for, at Broadhurst Park next month when they will play Benfica in a friendly."

Porto manager Julen Lopetegui knows Pep Guardiola well - they were team-mates at Barcelona in the 1990s. He knows what is required tonight and says his team will not sit back on their first-leg lead and will look to attack Bayern when they can, describing tonight's game as a "huge challenge".

BBC Radio 5 live's Pat Nevin at Allianz Arena

"The noise went off the scale as the Bayern players come out. The negativity from the first game has not gone through to the Bayern fans - they don't look worried at all. They look confident they will pull this one back.

"Bayern have had a really good Champions League bar one game. With the players they have and their home support, they can get a 2-0 win."

Ciaran Sloan: Jackson Martinez has been a very consistent striker these past few seasons, he is a very big threat for Bayern.

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Image source, Reuters

Whatever happens tonight, Pep Guardiola says he will remain Bayern Munich manager and will not be heading to Manchester City in the summer.

When asked about his future plans before this game, Guardiola said: "My future is: Wednesday free, Thursday training, and, of course, next year to be here. That's my future."

City fans... would you be happy with Pep? I imagine I know the answer to that.

Image source, Reuters

Maybe we're over-egging this. Maybe Bayern are in a decent position to go through. As forward Thomas Muller points out, "a 2-0 home win for Bayern wouldn't be a footballing wonder of the world". Easy then.

Our colleagues at BBC Radio 5 live have just tweeted this picture of their commentary team for tonight: Pat Nevin and John Murray.

Image source, AFP

Porto started like a 100m sprinter in the first leg at Estadio do Dragao, taking a 2-0 lead inside 10 minutes - Ricardo Quaresma scoring twice. Thiago Alcantara pulled one back in the 28th minute but Jackson Martinez's second-half strike ensured the boys from Portugal head into tonight with a healthy advantage.

Three defensive mistakes cost Bayern in the first leg. There's no margin for error tonight.