Hat-tricks from Erling Haaland and Phil Foden steered Manchester City past Manchester United in a 6-3 derby win that broke a number of records.
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City registered their biggest-ever derby first-half lead as Foden struck after only eight minutes before Haaland scored twice in four minutes and then set up Foden again before half-time.
United's substitutes hit back after the break through a wonderful Antony goal and a brace by Anthony Martial.
But, in between, both Haaland and Foden completed their trebles to leave the destination of the points never in doubt.
The win takes City to 20 points, one behind leaders Arsenal, while United are sixth with 12 points.
As well as it being the highest-scoring Manchester derby in Premier League history, Haaland became the first player in the competition to score hat-tricks in three home matches in a row.
He now has 14 goals from just eight fixtures and not only is Mohamed Salah's record of 32 goals in a 38-match Premier League season in doubt, but Michael Owen feels the overall record of 260 goals, set by Alan Shearer, is under threat.
"He's scoring at such a rate that Alan Shearer's record is attainable," said Owen, whose record of scoring three hat-tricks in 48 matches was also broken by Haaland by a margin of 40 fixtures.
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In Sunday's other match, Aston Villa earned their first away point of the season in a goalless draw at Leeds United.
But Villa were frustrated in being unable to exploit their man advantage after Luis Sinisterra was sent off for two bookings early in the second half.
Leeds remain unbeaten at home and are 12th with nine points, two places and a point better off than Villa.
Indonesian tribute
In both Sunday's matches, players, managers and match officials wore black armbands in tribute to the people who died at a football match in Indonesia this weekend.
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A Monday night East Midlands derby featuring the league's bottom two teams, Leicester City and Nottingham Forest will conclude Matchweek 9.
A first win of the season would take Brendan Rodgers' side above Forest.