Tournament/Event Duration
A football championship can take many weeks or months to finish and produce a winner. Many things can happen in a league that lasts for several months, and a football club that wasn’t favoured in the early days of the league could win the league, something that probably happened with Leicester City in 2016.
Personnel Changes
A long sports event will result in multiple injuries in a football club’s players and even some transfers. Some football clubs are even involved in multiple leagues where they’ll have to allocate their players carefully to improve their chances of winning in multiple leagues.
It’s important to keep an eye on any personnel changes, even potential ones, to guide a bettor on what team to bet on. An injury or a transfer of a key player or manager can shake up the outright odds.
Trends
In some competitions, a small selection of competitors routinely takes the top honours for years. Just eight teams won the Football World Cup out of the over 70 teams participating in the tournament for years. In the Premier League, Manchester City has won three times in the last four seasons, last 2018, 2019, and 2021, and it even has the lowest odds as of writing.
Teams frequently winning in tournaments typically have better odds than other teams and are the ones more likely to win the tournament.