Hull scored six second-half goals to thrash Fulham and go seven points clear of the Premier League relegation zone.
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It was the Tigers' biggest-ever victory in the Premier League.
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Ahmed Elmohamady started the rout with a 15-yard shot before Robert Koren swept in from Yannick Sagbo's cross and George Boyd drove in a third.
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Tom Huddlestone thumped in his first goal since April 2011, Matty Fryatt tapped in a fifth and Koren prodded in the sixth from close range.
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Huddlestone had promised not to cut his hair until he ended his goal drought. His long-delayed trim started within seconds of him scoring as he ran to the touchline so a member of Hull's backroom staff could snip off a lock of the midfielder's hair.
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It was only the fourth occasion this season that Steve Bruce's side have managed more than one goal in a game and it doubled their previous best Premier League win, a 3-0 victory over West Brom in October 2008.
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After a five-match winless run, and with games against Liverpool and Chelsea to follow, it could be a pivotal result for the buoyant Tigers.
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Fulham prepare for key matches against West Ham and Sunderland in an altogether different mood after a fourth defeat in six matches under new manager Rene Meulensteen.
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Any optimism derived from their 2-1 win at Norwich on Thursday was extinguished in a hapless second 45 minutes at the KC Stadium and they have now conceded 15 goals in their last four games and 41 this season.
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Meulensteen made six changes and Fulham were actually the first to threaten when a sweeping passing move ended with Ashkan Dejagah feeding John Arne Riise for the Norwegian to force a save from Allan McGregor, who had been passed fit after a scan on a knee injury.
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But the Tigers quickly began to dominate and Huddlestone had one free-kick from a tight angle pushed away by Fulham keeper David Stockdale, who was on loan at Hull during their run to promotion last season, and was then denied by the post from a similar effort.
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As the Tigers pressed, Stockdale pushed over the bar after Boyd met Elmohamady's cross with a stab at goal before Sagbo just missed with a curling shot.
Hull CIty did nt even show signs that the goals will be that many when i saw him. Fulham just have to sit-up.
Great win for Hull City after that unexpected Manchester United defeat that saw them go 2 - 0 early in the first half.