Chelsea manager José Mourinho hailed Diego Costa after the forward scored twice and impressed during his home debut for the club.
The Blues defeated Real Sociedad 2-0 at Stamford Bridge with the Brazil-born Spain international finding the net on both occasions.
Mourinho praised his new forward after the match and admits he is the attacking options Chelsea have been waiting for.
Guardian quoted the Chelsea boss, he said: "What can we expect? I expect Diego and Diego is a team player who works hard, he’s not just about goals.
"It’s about his defensive work, mentality and ambition. This is the player we bought and we were waiting for since last season.
"This is why we didn’t buy a striker in the winter market. We were waiting for him, we have him and hopefully everything goes well."
Mourinho believes Costa has already adapted to English football and insists his £32 million price tag is a bargain.
The Blues manager added: "He looks adapted to the team and the Premier League, not just Chelsea, should be happy. Sometimes we lose important players going to other countries and sometimes we bring new top players here.
"You can consider that [a bargain] because the market is crazy and the values are very high.
"For a striker like him, a champion in Spain, a Champions League finalist, a 25-year-old, we consider the price was very much in our favour."
