Chelsea 2 Bradford City 4

HAPPY birthday Jose – it’s got to be better for you than Saturday!

Mourinho turns 52 today but there is hardly any reason to celebrate after what just happened at Stamford Bridge.

City fans must have thought they’d seen it all in the cup exploits of two years ago. But this one was from another level.

Winning at Chelsea, THE Chelsea, tops the lot. Even getting to Wembley is put in the shade by the delicious drama that unfolded in front of the 6,000 strong travelling army.

Chelsea never lose at home. Chelsea don’t even concede at home.

Mourinho has never let in four at home with any of his teams. But then when they are jam-packed with top quality you don’t expect to.

Sunderland last season are the only other English team to have beaten the Portuguese at Stamford Bridge in 90 minutes. But they didn’t come from two down.

Chelsea had won all ten of their Premier League home games this term; yet in the space of one afternoon, or 48 minutes plus an eternity of added time, City had blown that record to smithereens and scored more goals than the rest of their previous opponents combined.

No wonder the fans were singing “Phil Parkinson is the Special One” at the final whistle.

That’s when they weren’t mocking Chelsea with chants of “easy, easy” or “can we play you every week!”

You have to go back to Parkinson's first season in charge for the last time City scored four on the road. It wasn’t too far from Stamford Bridge either – just up the road in Barnet.

That shows the mind-blowing scale of this upset of all FA Cup upsets. A poll on Match of the Day confirmed that, and who am I to argue with Robbie Fowler and Gaby Logan.

This was David slaying Goliath after the big man had been given a free shot – or two, in Chelsea’s case.

Yes, Chelsea made nine changes from the Liverpool game in midweek. So they fielded “reserves” like Petr Cech, Didier Drogba and Loic Remy – some second string.

Without going over tired old ground, Chelsea’s line-up still cost over £150m – compared, of course, with the £7,500 City shelled out for James Hanson. The nine different nationalities in the blue had still swept aside a Watford team chasing promotion in the Championship in the last round.

But this was the day the King’s Road was transformed into Midland Road. West Yorkshire voices, loud and so very proud, ruled the air, showing the same respect for lofty reputations as the claret-and-amber warriors on the pitch before them.

It was a tone set by Stephen Darby thundering into Mohamed Salah after nine minutes. The message was sent out: “Yes, we know you’re a good team but do we look scared...”

Cech turned party-pooper with an astonishing left-hand block to deny a thunderbolt Andrew Davies header. “It was the best save I’ve ever seen,” said a disbelieving Andy Halliday afterwards. “I thought then this wasn’t going to be our day – the ball is never going to go in.”

Set-plays had been ringed as the deadliest weapon in the City armoury. But it was Chelsea who struck first from one of their own.

The marking was sloppy and Gary Cahill slipped in front of Rory McArdle at the near post to convert Oscar’s corner with a cheeky flick with the outside of the foot.

It was 2-0 after 38 minutes. Filipe Morais, so desperate to impress on his first proper outing at the club where his career began, was pick-pocketed by Ramires in the centre circle.

The Brazilian surged forward menacingly, swapped passes with Salah, and wrong-footed Ben Williams to score off the post. Game over, surely?

Fleeting fears of another Swansea-style massacre began to surface. Parkinson could not get to half-time quick enough to give his team a chance to shake their heads.

“Obviously you do fear the worst at that point,” he said. “But I always felt on the touchline we had players who could create something against them.”

And three minutes before the break it happened. A free-kick from Morais skimmed off Davies and landed at Billy Knott’s feet to the left of the box.

He pulled it back to Jon Stead, who took a couple of touches to get the ball out of his feet before unleashing a wonderful left-foot strike that beat Cech for power into the top corner. Chelsea had conceded at home for the first time in 442 minutes.

It was Stead’s seventh for City and kept up his record of scoring in every FA Cup round. Huddersfield must have strikers coming out their ears if they are happy to let him go.

His goal was the catalyst for the magical scenes to come – and he seemed to be at the heart of everything that followed.

Parkinson had pushed James Hanson wide to the left, a reprise of the role when he started at Valley Parade six years ago, where he could get at rookie right back Andreas Christensen.

With Knott bursting through the middle, it was a fluid system intent on pulling Chelsea’s back four out of their comfort zone. John Terry was one of the big-name absentees and how he must have squirmed on the bench.

The goal had given the City support their moment to savour. Whatever happened from then on was a bonus. But the players had the taste for it and demanded more, much more.

They delivered a second-half display of stunning proportions that will live long in the memory.

Mourinho had added Willian and Cesc Fabregas to the fray by the time City drew level. Hanson flicked on James Meredith’s throw-in, Cech saved alertly from Knott and the rebound came out for Morais to score the goal he had dreamed of since the draw was announced.

City celebrated, Chelsea seethed. But the brief flurry in response was cut abruptly short as the visitors grabbed a sensational lead.

Morais crossed into Stead, who held the ball for what seemed an age before picking out the incoming Halliday. The Scot met it sweetly and the shot arced beyond Cech.

The packed Shed End collectively pinched themselves. City were in dreamland.

Chelsea dug out the kitchen sink but their best chance fell to centre half Kurt Zouma with a defender’s special into Row Z.

The number seven on the fourth official’s board brought disbelief from the away dug-out but they need not have worried.

Instead it was time for City to pile on the embarrassment as sub Mark Yeates chipped in to Stead, the striker again held the ball up almost with disdain and waited for the Irishman’s run-around to complete the scoring.

Glorious, absolutely glorious.