Saturday's 2-0 win at home to Huddersfield Town also sent the Whites top and one point above West Brom. So how have the odds changed in the promotion race?
We take a look at the prices for all of the teams in the top 16 to win promotion as well as listing the odds for a top-two finish and there's a bizarre twist with Leeds.
7. Bristol City - 40-1
Position: 7th. Points: 55. Odds for promotion: 40-1. Top-two finish: 500-1. Photo by Harry Trump/Getty Images. | Getty
8. Blackburn Rovers - 35-1
Position: 10th. Points: 53. Odds for promotion: 35-1. Top-two finish: 500-1. Photo by Lewis Storey/Getty Images. | Getty
9. Cardiff City - 33-1
Position: 9th. Points: 54. Odds for promotion: 33-1. Top-two finish: 500-1. Photo by Stu Forster/Getty Images. | Getty
10. Millwall - 14-1
Position: 8th. Points: 54. Odds for promotion: 14-1. Top-two finish: 500-1. Photo by Alex Burstow/Getty Images. | jpimedia
11. Preston North End - 12-1
Position: 6th. Points: 56. Odds for promotion: 12-1. Top-two finish: 350-1. Photo by Lewis Storey/Getty Images. | Getty
12. Nottingham Forest - 13-2
Position: 5th. Points: 60. Odds for promotion: 13-2. Top-two finish: 125-1. Photo by Nathan Stirk/Getty Images. | Getty