The United States’ success in the group stage has grabbed the headlines and they now head into the round of 32 with high hopes.After topping Group D with wins against Paraguay and Australia, the U.S. will face Bosnia and Herzegovina at Levi’s Stadium in Santa Clara, California, in the first knockout round of the World Cup.The match kicks off at 8pm ET/5pm PT/1am+1 BST, with the winners securing a round-of-16 tie against either Belgium or Senegal.Here, The Athletic has compiled all you need to know about the officials for the game.Who is the referee?Brazilian referee Raphael Claus has been appointed to officiate the fixture, in what will be only his second match at this World Cup, having taken charge of Spain’s 4-0 victory over Saudi Arabia in the second round of group matches.The 46-year-old dished out two yellow cards in that game, and was instructed by the VAR to rule out a fifth Spain ‘goal’ in stoppage time for offside, blowing the full-time whistle moments later.Raphael Claus disallowed a Spain goal via VAR in the group stages (Maddie Meyer/FIFA via Getty Images)Claus officiates in the Brazilian domestic league, and is one of 12 referees at the tournament from CONMEBOL, the South American football confederation.