Richards, currently training with Team GB ahead of the Olympics, does not expect them to stroll to another trophy next term and believes up to five other clubs could be challenging for the gong.
"I don't think it's going to be easy," he told Sky Sports. "People say we're going to go and walk the title but I don't think that's the case.
"I see everyone as big threats really. Obviously Spurs have got a new manager and players will be going there to improve and show people what they can do. Manchester United as usual, Chelsea have spent some decent money in the summer, so they'll be looking. Arsenal always are about and Liverpool."