Southampton manager Ronald Koeman believes the remainder of the Premier League clubs need to improve in order to challenge Chelsea next season.

Jose Mourinho's Blues are on the verge of securing the Premier League title which will come in the form of a win over Crystal Palace at Stamford Bridge on Sunday.

Chelsea have recently been criticised for being 'boring' but Saints boss Koeman certainly does not agree with that sentiment which has been bandied around in the past week.

"They were the best team, the strongest team mentally. I don't agree with boring Chelsea because it is about winning, about winning titles," said Koeman.

"They have an unbelievable spirit in the team and all the credit to Jose and the players.

"They have a difference of about 10 points. I think the other teams, they should not say anything because Chelsea is the best team of this season.

"We need a reaction of the rest of the teams because the distance is too much."