Switzerland and Colombia are preparing to play each other for the last remaining Quarter Final place at the 2026 World Cup.
The winner will face either Egypt or defending champions Argentina, with those two playing each other earlier in the day.
Here's who will be officiating the vital Round of 16 clash.
El Salvador official set to take charge of his third World Cup match
The final Round of 16 match will be officiated by Salvadoran referee Ivan Barton.
It will be his third game of the tournament, having previously officiated group matches between Turkey and Paraguay and Japan and Sweden.
Barton went viral during the Turkey and Paraguay match after his overly dramatic announcement of a red card for Miguel Almiron, following a VAR review.
That incident saw the official become the first to issue a red card for a player covering their mouth with their hand.
The 35-year-old is featuring in his second World Cup, having taken charge of three matches at Qatar 2022, including England's Round of 16 match against Senegal.
Barton will be joined on the pitch by two fellow Salvadorans, with David Moran and Antonio Pupiro assisting from the sidelines.
Meanwhile, Katia Itzel Garcia and Sandra Ramirez, both from Mexico, will be assuming fourth official and reserve assistant referee duties.
Barton's previous record is pretty unpredictable when it comes to dishing out cards, with only three players booked during the three World Cup matches at Qatar combined.
However, during 21 Salvadoran league matches in 2025 and 2026, Barton dished out 12 red cards and a staggering 113 yellows.
However, he has been a little less card happy during this summer's tournament, handing out just five yellows altogether in addition to Almiron's red.
