A late own goal from Wes Harding sent Leeds United above West Brom in the Championship table, while Fulham have moved up to third.
Championship leaders West Brom let in a late equaliser at Barnsley on Boxing Day but Leeds were unable to capitalise.
Fulham cut the gap to second-placed Leeds to nine points with a valuable 2-1 victory over Marcelo Bielsa's men at Craven Cottage.
Leeds United's failure to hold onto a 3-0 lead against Cardiff City means West Brom end Saturday at the Championship summit.
A 1-1 draw with lowly Wigan Athletic denied West Brom the chance to climb back above Leeds United at the top of the Championship.
Bristol City's 2-0 win at Fulham put the Robins right in the promotion picture, while leaders Leeds United beat Huddersfield Town.
Manchester City have a favourable draw in the FA Cup third round, but there are difficult trips for Everton and Manchester United.
Brentford scored seven times in a rampant win over Luton on a day when Leeds went top of the Championship with West Brom not playing.
A comfortable home win over Bristol City moved West Brom back into top spot, while Garry Monk avoided defeat against his former side.
Jake Livermore was on target as West Brom saw off Hull City, while there were wins for Preston North End and Leeds United.