Costa completed a switch to Stamford Bridge in the summer, with the Blues matching the £32 million buy-out clause set by Atletico Madrid for the forward’s services.
The Brazil-born Spanish international netted 27 goals in 35 La Liga matches last season, as well as totalling eight goals in nine Champions League matches. Whilst a number of critics were doubting his the 25-year-old’s ability to transfer his skills to the English game, he has so far done nothing but impress, netting eight goals in his first six Premier League games - scoring in all but one - and surpassing the record for the most goals scored by any player in their first four Premier League games, with seven.
He has yet to score in the Champions League for the Blues, but he has adapted to the style of Jose Moruinho’s side with ease, and one man that has been impressed with Costa is captain John Terry, who has called him a ‘great character’.
Speaking after the 1-0 victory at Sporting CP, club legend Terry was quoted by the Daily Star saying: "With Diego, strikers can take months and months [to adapt] but he’s scored eight goals already, which is superb, that’s great for us.
"He’s a great character, without speaking a word of English he gets by and gets on great with everyone. He’s come to the Premier League to win, he made that clear in pre-season.”
Costa has been praised for his work ethic and determination to win, a trait that suited itself to Atletico Madrid, and has been transposed to his new career in West London. He is seen as the archetypal Jose Mourinho player, and has been called ‘the missing piece of the jigsaw’ that will see the Blues storm the Premier League race. With the trophy eluding Stamford Bridge since 2010, fans and players alike will be hoping to see Costa continue his impact well into the season proper.