West London derby been in the Football League for a longer period of time than Brentford and had stronger rivalries with the likes of West Ham United and Tottenham Hotspur, whereas Brentford's main rivals are Fulham and QPR. Also Brentford developed a bigger sporting rivalry with Arsenal at the time as both clubs vied for the title of London's number one club. The only bad feeling between the clubs was soon after Chelsea's foundation and admission into the Football League in 1905, the other West London clubs, including Brentford, lost many supporters and potential supporters to the only professional Football League club in
Manchester City F.C. supporters increasing as the club fell to the second, and then third tier of English football for the only time in the club's history in 1997. Since moving to the City of Manchester Stadium in 2003, the club have sold approximately of 36,000 season tickets in every season they have played and average attendances have ranked in the top 5 of English football since. Manchester City supporters are distinguishable by their sky blue, a colour which is only used by a handful of professional football clubs in England. The City supporters' song of choice is a rendition "Blue Moon" and are