The Brazilian-born Spain international was the Blues’ marquee buy of the summer, arriving from Atletico Madrid in a £32m deal.
Costa was impressive last term, netting 30+ goals for the La Liga champions, and has widely been dubbed as the man to answer Mourinho’s cries for a top class striker – which he suggested cost them the title last season.
The powerful front-man has been impressive in the Londoners’ warm-up games ahead of their Premier League opener against Burnley tomorrow, finding the back of the net with regularity.
In his younger years he was a backup to Aguero at Atleti, and Mourinho believes that he has shown that he’s a better player than the Argentine since then:
“He was in Portugal and I never looked at him! He went to Atletico and Sergio Aguero was the superstar, so Diego went on loan. Then, they brought in Radamel Falcao – and Diego went out on loan. He was behind very important players.” He is quoted by The Mirror.
“When the chance came to go back, he showed he was better than the previous ones.
“But he is still the same honest, naïve, warm guy from a small village in Brazil that is, as we say, beyond the sunset.
“He interacts in the group and has conversations… even though he knows only 10 words of English.”