Pep Guardiola believes it is disrespectful to speak about the battle for top spot in the Primera Liga as being a two-horse race.
Barcelona have made an excellent start to the defence of their crown, winning four consecutive games, while big-spending Real Madrid also have a perfect record so far.
Many experts think it will be a close contest between the two European giants but have dismissed the threat of other teams.
Guardiola takes a different view and is still wary of rivals such as Sevilla, Valencia, Villarreal and Atletico Madrid, whose results to date have all been inconsistent.
"It is a lack of respect, after four games, to think that it will only be between Barca and Madrid. I do not believe that," Guardiola told reporters.
Hard work"If we have won all our games up until now then it is because we are both in form. If we have won matches it is because we have been better than our opponents.
"Nobody has let us win. Every team works far more hours than the pundits that are saying these things.
"I want to see my team give everything in each game and we need players that are feeling fresh and want to win.
"We never leave anything until the next match. This is how we did things last season and how we shall do things this term."
