Chelsea head coach, Mauricio Pochettino has called on Chelsea fans to “believe in the process” after his side slumped to a 3-1 defeat away to West Ham United in the Premier League on Sunday.

The Argentine former Tottenham Hotspur and Paris St Germain manager has taken on a big challenge at Stamford Bridge, trying to fashion a new identity for an expensively-assembled squad.

Pochettino said “That’s football. Teams like us, we need to get the right balance. I think today there were a few actions we didn’t manage well and we concede.

“Overall it is this type of game that is difficult to explain. You had the possession, you create and maybe you were the better side but in the end you lose,” told reporters.

He added that “It was the frustration when we miss the penalty. We were playing well and we didn’t get the reward.

“Disappointed but this is only the beginning. We need to believe in the process. I think we are going to be stronger and for sure be really competitive,” Pochettino said.

Eight players have been signed for around 325 million pounds (414 million dollars) since Mauricio Pochettino arrived in the summer as Chelsea try to re-invent themselves after finishing 12th last season.

One of them, Moises Caicedo, whose fee from Brighton could break the British record, was given a debut off the bench.

But his impact rather summed up Chelsea’s day as they remained on just one point from their opening two games.

His rash tackle inside the penalty area on Emerson in stoppage time gave Lucas Paqueta the opportunity to wrap up the points for West Ham from the spot, as he made no mistake.

Access24 reports that Chelsea have won just one of their last 14 Premier League games and have now lost four London derbies in a row.