blocking and tackling
Noun
Meaning
blocking and tackling (uncountable)
(idiomatic, US) Basic tasks or skills in an undertaking or occupation.
Examples
Some people try to find things in this game that don't exist but football is only two things - blocking and tackling.
Success doesn't necessarily come from breakthrough innovation but from flawless execution. A great strategy alone won't win a game or a battle; the win comes from basic blocking and tackling.