Premier League round-up in numbers: Arsenal-Spurs, Man United-West Ham...
Tottenham failed to keep hold of their lead in Sunday's north London derby, while David Moyes lost at Old Trafford yet again.
All eyes were on the Emirates Stadium on Sunday for the north London derby and there was a lot of comforting familiarity on display.
A red card, Erik Lamela attempting a rabona (and scoring it!) instead of using his right foot, and, of course, Spurs throwing away a lead.
Elsewhere, Manchester United remained on course to finish second as they ensured David Moyes' continues to dread returning to his former employers, while Sheffield United's first game since Chris Wilder's exit arguably proved just how good the Yorkshireman was as manager.
There was also a potentially vital win near the bottom of the table for Brighton and Hove Albion, and we have taken a look at all the best Opta facts from those games.
Arsenal 2-1 Tottenham: Spurs surrender once again in a north London derby
Lamela's opening goal will be shown in north London derby highlight reels for years – his rabona finish was so good, so audacious.
But even with that being the opening goal, it never really looked like being decisive, so underwhelming were Spurs otherwise from an attacking perspective – the fact they went on to lose meant they have now dropped 45 points from winning positions against Arsenal in the Premier League, the most of any team against a specific opponent in the competition.
After Martin Odegaard levelled, becoming just the fourth Gunners player to score in his first top-flight north London derby, Alexandre Lacazette's second-half penalty secured Arsenal the points.
It was Spurs' ninth league defeat of the season, the joint-most Jose Mourinho has ever suffered in a single season, and Lamela's sending off certainly did not help their situation.
In collecting two bookings, he became only the fifth substitute in Premier League history to score and be sent off in the same game.
His goal will be the enduring moment from the match, but in the grand scheme it was meaningless for a Spurs side in increasing danger of missing out on the top four.
Manchester United 1-0 West Ham: Moyes' Old Trafford misery continues
It was not an occasion for the neutral at Old Trafford as Man United scraped an unconvincing win thanks to an own goal by Craig Dawson.
The defeat means only Harry Redknapp (15) has managed more Premier League games away to United without winning than former Red Devils boss Moyes (14 – four draws, 10 losses).
The Hammers' difficulties in front of goal were partly to blame as none of their seven attempts were on target, the highest number of shots they have had in a league game without a single accurate once since August 2013 (nine shots).
On the flipside, Man United kept a fourth straight Premier League clean sheet for the first time under Ole Gunnar Solskjaer, with the club last achieving that feat in January 2018 under Mourinho.
They have also lost just one of their previous 23 league outings having suffered three losses in their opening six games this term.
Leicester City 5-0 Sheffield United: Blades suffer bruising defeat as they venture into the Wilder-less wilderness
Less than 24 hours on from confirmation of Wilder's "mutual" departure as Blades manager, many were likely left wondering why the club did not fight harder to keep him.
While seemingly doomed for relegation anyway, Wilder retained significant respect for the job he presided over at Bramall Lane, and Sunday's result showed why.
With interim boss Paul Heckingbottom taking over for the first time, he has already shipped five goals in a single game as many times as Wilder did in 227 matches (a 5-4 defeat to Fulham in 2017). Their former manager was never beaten by more than a three-goal margin.
Heckingbottom also became only the third manager in Premier League history to lose by five or more goals in his first game, but this should not take credit away from Brendan Rodgers' ferocious Foxes.
Kelechi Iheanacho scored his first hat-trick and also netted in three successive top-flight games for the first time. Jamie Vardy set up two of those goals and in doing so became only the sixth player to register 100 or more goal involvements in the Premier League after turning 30.
Those to achieve this before him were Teddy Sheringham, Frank Lampard, Ian Wright, Alan Shearer and Gianfranco Zola – esteemed company indeed.
Southampton 1-2 Brighton and Hove Albion: Seagulls remember their shooting boots as Saints sink
Much has been said and written about Brighton's woes in front of goal this term, but they got the job done here.
Their 2-1 win at St Mary's is only the second time in 2021 that they have scored twice or more in a single Premier League game – the other instance was their 3-3 draw with Wolves in their first match of the year.
This was their 11th outing since.
The win took Graham Potter's men three points clear of the relegation zone and just four behind Saints, who are in a difficult spot.
It is 10 defeats in the past 12 Premier League games now for Southampton, with Ralph Hasenhuttl coming under increasing pressure – their previous 10 losses came across a 38-match spell.