The top stories making Monday's back pages in the UK...
The Sun: Alex Ferguson suffered his 'worst ever day' as Roberto Mancini's Manchester City set off rockets at Old Trafford yesterday.
Also: John Terry last night insisted he did not make a racist slur at Anton Ferdinand during Chelsea's shock derby defeat at Loftus Road.
Daily Mirror: Roberto Mancini hailed 'crazy' Mario Balotelli for inspiring Manchester City to a historic win over their neighbours and title rivals.
Daily Star: Sir Alex Ferguson admitted Manchester United's thrashing by local rivals City left him shattered yesterday.
Daily Mail: Manchester City gave Sir Alex Ferguson the worst day of his football life as they stormed Old Trafford to thrash neighbours United 6-1 in the Barclays Premier League.
Also: Another Sunday, another Robin van Persie show to drive Arsenal on to victory at the Emirates.
And: Liverpool and Tottenham are continuing to monitor Werder Bremen's German international playmaker Marko Marin, with Arsenal and Chelsea also interested in the midfielder.
Daily Express: Sir Alex Ferguson admitted the stunning Manchester derby defeat was his worst humiliation in half a century in football.
Also: Andre Villas-Boas last night accused referee Chris Foy of 'losing it' and admitted he had a post-match bust-up with the official as Chelsea crashed to a 1-0 defeat at Queens Park Rangers in a frenzy of cards.
Metro: Inter Milan are set to go head-to-head with Arsenal for the signature of Marseille winger Andre Ayew.
Also: Theo Walcott is ready to snub a big-money move to Juventus by signing a new contract with Arsenal.
Daily Telegraph: By the end of the Demolition Derby, Manchester City fans were convulsed with joy revelling in the sight of the majestic David Silva putting the champions to the sword, serenading Sir Alex Ferguson with 'getting sacked in the morning' and designing their 'Six and the City' T-shirts. Incredible.
Also: From Manchester all the way to West London, the noisy neighbours were in quite raucous form yesterday.
The Times: A 'shattered' Sir Alex Ferguson bemoaned his 'worst ever day' in football as Manchester City crushed Manchester United 6-1 at Old Trafford yesterday to issue a devastating statement of intent in the title race.
The Guardian: 'Why Always Me?' read the lament on Mario Balotelli's t-shirt. 'Why Always Them?' Manchester City fans have complained about United for generations. Not any more.
Also: A furious occasion has drained composure from Chelsea's pursuit at the top. Andre Villas-Boas' side lost their discipline as well as a West London derby and an opportunity to hoist themselves into second place and nearer Manchester City was passed up.
The Independent: The last time something of this significance happened, Sir Alex Ferguson repaired home to Wilmslow and buried his head under a pillow, having also contemplated placing it in an oven.
Also: John Terry last night categorically denied directing a racist comment towards QPR defender Anton Ferdinand during Chelsea's tempestuous derby defeat at Loftus Road.