If Nothing Else Meaning

(idiomatic) At the very least, as a minimum

Example: 2014, Daniel Taylor, "World Cup 2014: Uruguay sink England as Suárez makes his mark," guardian.co.uk, 20 June:
  Briefly, they had threatened to turn the game upside-down after Wayne Rooney’s first-ever World Cup goal made it 1-1 after 75 minutes. If nothing else, England had shown perseverance but, then again England always show qualities of endurance.