Though Chelsea finished the season by winning the Uefa Champions League and FA Cup, Obi is adamant that the League will witness a more determined Chelsea this new season.
"It hurts us that it was such a big gap last season. We spoke about it. We don't want that to repeat itself," Obi told the London Evening Standard.
"We don't want a repeat of last season when we slipped out of the top four but, for us, the top four is not the target.
"The most important thing is to win the trophy. We want to regain the trophy."
Obi also said the players would not be affected by their fourth consecutive loss – the Charity Shield loss to Manchester City last Sunday.
"We're on the right track and if we keep doing what we're doing now, we'll be fine this season.
"It's going to be a long season. It's going to be too many games. It's about how you cope with it, how you manage the players and how you get through the games."
"We want to defend the Champions League, we want to win the Premier League and, hopefully, we want to challenge for every cup," Obi concluded.