Alexis Sanchez hit a dramatic extra time winner to put Arsene Wenger on course for FA Cup history.

Arsenal fought back from going a goal down to win a thrilling semi final with a 110th minute tap-in from Sanchez and Wenger is now dreaming of a record seventh FA Cup win.

It broke Manchester City’s hearts as Pep Guardiola’s men will be cursing their luck and near misses which ultimately cost them.

City were desperately unlucky not to be ahead at half time when linesman Steve Child wrongly ruled the ball had gone out before Raheem Sterling put it in the net.

But City took the lead after 62 minutes when Sergio Aguero pounced on some poor Arsenal defending, exposed Monreal and lifted the ball over Petr Cech who was slow off his line.

That looked a devastating blow for Arsenal but Monreal, of all people, made amends by scoring a 71st minute equaliser from Alex Oxlade-Chamberlain’s cross.

City roared back as Yaya Toure and Fernandinho hit the woodwork while Danny Welbeck missed a big chance to stop the game going into extra time.

Here are five things John Cross learned...

Sergio Aguero scores the opener for Man City (
Image:
Rex Features)
After having one disallowed, this one stands for Aguero after he chipped over Cech (
Image:
Rex Features)

1. Pep’s underwhelming first season

This must go down as a big disappointment for Pep Guardiola, the manager deemed as the best in the world, the prize catch and he’s ended up potless after his first season.

City are still a work in progress but this must go down as a big disappointment and Guardiola must build his own squad for next season - and improve dramatically.

2. Arsenal dug deep to show their resilience

They have been on such a poor run that you questioned their belief and confidence.

When they went behind it looked really bad, but Arsenal’s gritty performance was for the fans and for their manager.

A really brave, strong performance long into extra time.

Nacho Monreal levels for Arsenal (
Image:
REUTERS)
Monreal scored after a perfect run at the far post (
Image:
REUTERS)

3. Wembley are trying - and it’s sort of working

One of the big criticisms of the new Wembley is a lack of atmosphere (the pitch is actually better these days) but the crowd was fabulous on Saturday and it was good again today.

Slightly manufactured with blue silver foil flags and red and white flags. But they’re trying and, just before kick-off, there was a good noise and atmosphere.

Pep Guardiola looks on while players receive medical attention before extra time (
Image:
REUTERS)
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Image:
PA)
Sanchez wheels away after bundling home the winner (
Image:
AFP)

4. Reffin hell

We really should have the best refs for the best games. Craig Pawson is up and coming - but not among the best, in my opinion. Martin Atkinson on Saturday, why not Michael Oliver today?

Pawson and his linesmen made key areas, the worst when Manchester City had a goal wrongly ruled out after Leroy Sane’s cross was judged by linesman Steve Child to have crossed the line before Raheem Sterling put it in. It didn’t go out.

Pawson lost the game when he failed to book Gabriel for a foul on David Silva which ultimately forced the Manchester City midfielder off early.

Aguero scores a goal which is later wrongly disallowed (
Image:
REUTERS)

Then no-one could complain when Pawson didn’t book Vincent Kompany for a foul on Mesut Ozil which also should have been a booking.

Alexis Sanchez was eventually booked for a foul which wasn’t as bad as either of the other two as Pawson tried to play catch up. He’d long since lost authority.

5. Arsenal use rough stuff

Laurent Koscielny, Gabriel and Granit Xhaka all got stuck in and boot the boot into Manchester City in a very un-Arsenal sort of way.

You could argue it’s time Arsenal toughened up. It annoyed City who were dominant and frustrated them.

First, Arsenal went to a back three at Middlesbrough (which they stuck to again) and now they are using rough house tactics.

Whatever next?