How does the Davis Cup format work?

The Davis Cup is the biggest annual team competition in tennis, taking place all over the world and involving around 275 ties a year in 65 different countries.

The competition is split into different levels, with nations competing firstly based on their ranking and then on a promotion and relegation basis.

Need a handy guide for understanding how a team could go all the way from the lowest level of the competition to become champion?

Look no further than this explainer video