Simon Sinek in his book The Infinite Game , mentions the need of having an Worthy Rival to keep motivating another player to play better in an Infinite Game.
Frequently we come across scenarios like the case of Kodak , Blockbuster , Myspace where they found themselves playing the Infinite Game without an Worthy Rival.
This is when they took their dropped their focus and intensity and became complacent.
This is the reason all the three are now extinct.
This is why a WORTHY RIVAL always keeps us on our toes and inspires us to keep innovating by the day.