Spain has been unimpressive in the group stage despite their clean sheets, and now they're losing Nico Williams to injury heading into the knockout round — the pressure is on La Roja to perform. Austria is a massive longshot making their first World Cup Round of 16 appearance since 1954, which means they're playing with pure house-money energy and zero fear. With only a 1.5-goal spread, one disciplined defensive performance from the Austrians is all it takes to cash this ticket, and overlooked underdogs in do-or-die moments are exactly where upsets are born.