Everton manager Roberto Martinez overcame his usual sense of restraint and hyperbole avoidance to acclaim Romelu Lukaku's goal as "one of the great goals we will see in the FA Cup".

"It is a fantastic feeling, more than anything the atmosphere that was created," Martinez added. "Every one of us will take it away. Today was the complete feeling."

Bite, whisper, or full-on smooch? Watch the video and make up your own minds.

I've seen it over and over (not in a weird way) and I still can't decide. Bar-room brawl, or nightclub nuzzle? I'm so very, very confused...

Costa, not one to come over all Edith Piaf, apparently expressed his regret to Chelsea officials after the match.

"Diego spoke to club officials and expressed regret over his reaction to the challenge from Barry that led to his red card," a club spokesman said.

"But Diego was also very clear that he did not bite him at any point during that altercation."

Chelsea manager Guus Hiddink - and folks, this may shock you - did not see the incident.

"It is difficult for me to say yes or no so I don't want to give judgement on this," he added.

Image source, Reuters

There was controversy in last bite's game - sorry, sorry, last night's game, as Everton knocked out Chelsea 2-0.

Romelu Lukaku scored an absolute worldie, then added another with a low drive, but it still wasn't enough to get his face on the back page of the papers.

No, that face was of course the heavily stubbled visage of Diego Costa, who, in a totally uncharacteristic fit of pique, squared up to Gareth Barry and was then sent off after appearing to bite the Everton midfielder.

Normally such a nice young man...

If you've missed the action from the People's FA Cup you can still catch the highlights from the semi-finals on the iPlayer.  

See Karl's amazing goal, meet the rest of the Pompey Amputees and hear about more inspiring stories.

BBC Sport

We will of course bring you live text commentary of those games right here on the BBC Sport website.

In addition, you can listen to radio commentary on Radio 5 live from 13:00 GMT - Alistair Bruce-Ball and Steve Claridge will guide you through Arsenal v Watford, before Alan Green and John Hartson take the reins for Manchester United v West Ham, with Conor McNamara providing updates from Villa v Spurs.

On the TV, Mark Chapman presents MOTD2 Extra on BBC Two from 12:15 GMT, before full highlights of the day's action - first the Premier League in MOTD2 on BBC One at 22:30 GMT, followed by the FA Cup highlights at 23:00 GMT.

Here's what's on the menu today, including a potentially crucial clash in the Premier League as well as those FA Cup quarter-finals:

Premier League

Aston Villa v Tottenham (16:00 GMT)

FA Cup

Arsenal v Watford (13:30 GMT)

Manchester United v West Ham (16:00 GMT)

Image source, Getty Images

Yes, while things might be going a little bit pear-shaped for Arsene Wenger in the league, in the cup he can do no wrong.

The Gunners are 15 games unbeaten in the competition, and are three wins from a historic three-peat - something no side has managed since Blackburn Rovers beat West Bromwich Albion in 1886.

Not only that, but victory in this year's competition would be Wenger's seventh triumph, making him the most successful manager in the history of the FA Cup.

Hello, and welcome to another rip-roaring day of FA Cup action.

Later, Manchester United take on West Ham, but first, defending champions Arsenal meet Watford for a place in the semi-finals.

That one gets under way at 13:30 GMT.

Arsene Wenger.

A man out of touch.

Image source, Getty Images

A man out of time.

Image source, Getty Images

A man losing his grip.

Image source, Reuters

Or...a man on the brink of unparalleled greatness?

Image source, Getty Images