Australia team captain Lleyton Hewitt said reputations and world rankings 'get thrown out the window' in the new, abbreviated Davis Cup Finals format.
Colombia salvaged a point from its tie against Belgium with a doubles comeback from Juan-Sebastian Cabal and Robert Farah
Croatia's hopes of defending its Davis Cup title took a huge early blow as it was beaten 3-0 by Russia in Madrid.
This episode of Stars of Russia profiles Tottenham's Son Heung-min and Argentine goalkeeper Sergio Romero. Watch every episode on Mondays from 6pm (AEST) on beIN SPORTS 2.