It was a night to forget for Chelsea.

They were , had a man sent off and never really looking like challenging their German opponents from the second the game kicked off.

Bayern Munich are a great team, a really great team.

But this simply wasn’t good enough from the Blues and things don’t look like they’re going to improve any time soon.

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“The performance was poor and sometimes you have to be brutally honest,” head coach Frank Lampard said after the game.

“They outclassed us in every department and it’s quite sobering.

“I’m disappointed we couldn’t do more against them. We have to take it on the chin and work towards getting back to the levels we want to be at.”

And ‘take it on the chin’ they must, but the way things are panning out doesn’t bode well for Chelsea’s European hopes this season or next.

and Champions League floggings aside, Chelsea’s issues on and off the pitch are sticking out like a sore thumb — and it means they’ve got one hell of a Bavarian mountain range to climb in their second leg clash.

Here, we look at what really went wrong for Chelsea?

Can’t cope without Kante?

There was a gaping void left in the middle of the park — and Bayern exploited it with such ease in their three-goal rout at Stamford Bridge.

The absence of N’Golo Kante in midfield is proving to be more damaging than first expected.

The French World Cup winner was on the weekend, and the loss of such an important player has trickled through to the Champions League.

Without their midfield anchor, some serious gaps open up across the pitch — ones which the attack-minded Jorginho and Mateo Kovacic are failing to cover.

It’s a carbon-copy of what happened during Maurizio Sarri’s Chelsea stint — only this time Kante isn’t on the pitch at all.

Whether he’s sitting in the stands with an injury or being played out of position by the blind-alley beliefs of a crazed chain-smoking manager, Kante is not impacting the game the way he should be.

The 5 foot 6 inch two-time Premier League-winner should be shielding the back four, breaking up play and nipping at the feet of the opposition.

Without him, the stuttering Blues lack that non-stop energy in the middle of the park — meaning the likes of Thiago and Joshua Kimmich must’ve been licking their lips when they saw the teamsheet before the game.

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Jorginho and Kovacic were overrun in the Chelsea midfield

Do you play Giroud, Abraham, or neither?

It’s the same old story with this Chelsea team.

Their lack of depth up front has continued to plague them for the past few seasons.

No, we’re not talking about Gonzalo Higuain (because he really was rubbish), we’re talking about a 33-year-old Olivier Giroud and a 22-year-old Tammy Abraham in his first season as a starter at the top level.

Both are undoubtedly great strikers, but against a team of Bayern’s calibre – boasting world-class defenders in Jerome Boateng, David Alaba and Benjamin Pavard – they were shut-out with ease.

And to add insult to injury (quite literally), second-half substitute Abraham was seenafter the game.

The sorry image of Abraham somewhat capping off a miserable evening for the West Londoners.

If his ankle strain sidelines him for yet more time, the tricky task of finding the back of the net will be left in the hands of Giroud.

The flamboyant Frenchman proved he’s ‘still got it’ by , but he was unable to climb out of Boateng’s back pocket during the Blues’ damning defeat to Bayern.

It’s this inconsistency up front that could prove to be Chelsea’s achilles heel — and we haven’t even mentioned the defence yet!

Leaky backline treading water

Chelsea dodged a bullet by binning-off David Luiz to not-so-noisy neighbours Arsenal at the start of the season, right? Wrong.

The Blues faithful would be lying if they said they wouldn’t welcome the Brazilian back with open arms.

Chelsea’s defence has somehow worsened since the big-haired dogdy defender’s departure — and their comical structure and ability to mistime tackles was on full display in the Champions League.

Luck was on their side at the start of the season when academy product Fikayo Tomori emerged from his Derby loan spell to sit comfortably in the heart of defence.

But an injury to Antonio Rudiger and the young Englishman soon rocked the boat.

That meant the ageing Cesar Azpilicueta and Denmark’s answer to Bambi Andreas Christensen were thrust into centre back roles — neither of whom look confident there.

Throw in an overpriced goalkeeper lacking in confidence and you’ve got a recipe for disaster — a recipe that makes Gunners and West Brom flop Serge Gnabry look like the next Cristiano Ronaldo.

If truth be told, Chelsea are fortunate to be fourth on the Premier League table with their current defence — and even luckier that Bayern Munich took their foot off the gas towards the end of their Champions League tie.

That being said, it’s not necessarily Lampard’s fault.

The Stamford Bridge legend , only for controversial owner Roman Abramovich to refuse to get his hand in his deep pockets during the January transfer window.

Lampard’s limitations

It would be a difficult task for any manager to come back from 3-0 down, let alone for someone who is only in his second full year as a professional coach.

Lampard has been the one shining light of this Chelsea team this term — both domestically and on the European stage.

He carries himself excellently, talks extremely well and has shown the kind of passion on the Stamford Bridge sidelines last seen when Antonio Conte was at the helm.

But when it comes down to it, Lampard is still only a young manager and it’s starting to show on the pitch.

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Granted, he hasn’t got much to work with in his arsenal, but some of his questionable decisions and tactics during games have been .

Lampard has been in the game for decades, but pulling on the playing strip and commanding from the dugouts are two very different things.

Ones knowledge of the game as a former player can only take you so far — just glance over at Manchester United boss Ole Gunnar Solskjaer.

Bayern are better, that’s just football

Look at it this way: Which of those Chelsea players would get into that Bayern Munich starting eleven?

The answer is none of them.

And that’s not necessarily a season-defining issue — it’s just another factor that needs assessing by the manager when you come up against a team as deadly as Bayern.

“That’s football at this level,” said Lampard.

“The levels of Bayern Munich were fantastic, they are a really strong team and I was aware of that.

“If you look at the choice of passes they make, our choices have to improve.

“If our players have a bit about them, which I think they do, they will look at who they were playing against and the level they need to work to.

“Unless we were to get everything right and bang on then it was going to be a really tough night. And we didn’t get everything bang on, we weren’t confident on the ball and that was my biggest disappointment.

“So it was a harsh lesson, a reality for the players of the levels we want to get to.”

The nature of football means a team that’s undoubtedly better on paper doesn’t always necessarily win.

Despite all their faults, Chelsea could very well have grounded-out a well-earned draw against the Bundesliga heavyweights at Stamford Bridge.

Park the bus, catch them on the break, even potentially poach a last-gasp goal.

But it just wasn’t to be.

Bayern were the better team by a country mile.

And even if the Blues did salvage a draw on this miserable night in the nation’s capital, whether they could go to the Allianz Arena fortress for the second leg and somehow upset the odds is another question altogether.