Manchester City are top of the Premier League, and Liverpool's defence of their title looks to be in danger this season.
Recent years have seen City and Jurgen Klopp's Reds battle it out at the top of the table, but this year's title race is more keenly contested by other sides as well.
"I'm not thinking about being top, we're only in the middle of the season," Pep Guardiola said after City beat West Brom 5-0 to take top spot for the first time this season, the most recent in a seven-game winning run.
City became the ninth team to top the table in England this season, with just 20 rounds of fixtures played.
Since 1992, there have never been this many leaders in the same season. City are the latest, following Arsenal, Leicester City, Everton, Liverpool, Tottenham Hotspur, Southampton, Manchester United and Chelsea, who have all spent at least one night on top of the table.
The previous record was eight, which came in 1998/99, 2001/02, 2002/03 and 2007/08. The smallest number of leaders across a season has been six, which happened in 1999/2000, 2000/01, 2003/04 and 2016/17.
Source: Marca / Jon Prada - Conor Clancy