The Blues are expected to bring in several new faces this summer after a disappointing season but the Portuguese admits the World Cup in Brazil could delay their efforts
Chelsea manager Jose Mourinho has suggested he is unlikely to add to his squad until after the World Cup in Brazil.
The Portuguese is keen to bolster his squad this summer after falling short in the Premier League and Champions League, and earlier this month Goal revealed Atletico Madrid striker Diego Costa has agreed to move to Stamford Bridge in a £35 million deal.
Diego Costa is 16/1 with Bet365 to be top scorer in the World Cup
He told Sky Sports News: "Since the market will be open until August 31, like it is, I think it will be more of the same.
"I think people [will] wait for the World Cup, wait for the first reaction of the first team, wait until after something happens."
But despite the fact that he expects to make changes, Mourinho insists there is no need for major surgery on his developing Chelsea squad.
"At Chelsea, the manager is the same, the basic structure of the team is the same, we don't need the season to finish and the results of the season [to] make the decisions about what we need and what we don't need," he added.
"Everything was done during the season. We knew perfectly what we wanted and I don't think we have huge work to do during the summer really."