The Spain striker has netted 19 times in 32 Premier League outings this term and his double against Southampton last month saw him surpass 50 top-flight strikes for the Blues.
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Chelsea – who secured an FA Cup final spot by beating Tottenham 4-2 in April – will move seven points clear at the summit with a win over Middlesbrough on Monday and Costa knows how valuable his contribution has been as he eyes the 20-goal mark.
“Twenty is a good, solid total. Any club with a striker who is going to get 20 goals regularly, they are going to be up there competing for whatever competition they are involved in,” the 28-year-old told Chelsea’s official website.
“I am not one who is going to be looking at the goalscoring chart and I am not one who is looking for individual glory, it is always about scoring goals to pick up points.
“That is why I am looking for that consistency, that regularity of scoring, one goal every game or every other game rather than getting three or four and then having a drought.
“But with 20 I am happy. I did it in the first season at Chelsea, when we were champions, and if I get 19 or 20 this season and we turn out to be champions then great, it means something and it is for something.”
Costa has been linked with a mega-money move to Tianjin Quanjian, although the Chinese Super League club released a statement this week insisting they had “not been communicating with Diego Costa regarding the transfer”.
