Both nations will meet at Khalifa International Stadium knowing they have a chance to qualify for the knockout stages.
A draw will be enough for Ecuador to finish in the top two most sensitive in Group A, while Senegal will likely want all 3 problems due to the Netherlands facing Qatar already eliminated.
However, history is in favor of either team as they look to win rare appearances in the last 16 of this tournament.
While Ecuador reached the circular moment in 2006, it has never gone beyond its 3 matches at the organizational level without suffering at least one defeat.
The French would have done it in 2014 had they not suffered a 2-1 defeat to Switzerland thanks to a goal in the 93rd minute.
From Senegal’s perspective, the African Cup of Nations champions have never had a South American country at a World Cup.
In 2002, the Leones de Teranga were involved in a thrilling 3-3 draw with Uruguay, while succumbing to a 1-0 score against Colombia four years ago.
Both parties took position on the third day of the round-robin phase, and there is room for lightning to strike Al Rayyan for the third time.
On a more positive note for Ecuador, Enner Valencia is looking for something that has never been done in this competition.
With their goal opposite the Netherlands, Valencia joined a list of three players who have scored six goals in a row for their country in a World Cup.
Valencia already have the next player to join this sought-after list since 1994, and the 33-year-old now has the possibility of breaking the long-standing record.