Ecuador vs Senegal enter into a straight shoot-out for qualification for the knockout stages of the World Cup on Tuesday.
Having lost to the Netherlands in their opening match, a 3-1 victory over Qatar kept the African champions' hopes of advancing to the last 16 alive but Ecuador's draw against the Oranje gives the South American's the edge at Khalifa International Stadium.
Only a win will be enough for Senegal to progress to the knockout stage for the first time since reaching the quarter-finals in 2002, their first World Cup, and they will have to beat South American opposition at the World Cup for the first time having lost on two such previous occasions (Uruguay in 2002, Colombia in 2014).
Cisse is pondering tactical tweaks for the crucial clash.
"We have to think about the appropriate approach to the last match. We need to win to qualify for the last 16," Cisse said.
"Our concentration must be better as we could have avoided the goal that we conceded [against Qatar], but the Ecuador match will be different."
Coping without injured superstar Sadio Mane has been an issue for Senegal but the team shared scoring responsibility against Qatar, with three different scorers for the first time in their World Cup history.
Ecuador's defence has proven resolute this far, facing seven shots in two games, and this encounter marks the first time they have faced an African nation at the World Cup.
At the other end, Enner Valencia is looking to become just the second player to score seven straight goals for a single nation at a World Cup.
Valencia already has three in two appearances in Qatar and head coach Gustavo Alfaro was full of praise for the experienced forward.
"[Valencia] is a top-level player when he wears the Ecuador jersey. I tell him that he will be successful in the World Cup even if he wasn't so much in the qualification campaign," said Alfaro.
"He is going through such a good spell. He is the captain."
Enner Valencia's continued battle to shake off the injury he picked up against Qatar on opening night took a rough turn as he left the Netherlands game on a stretcher… only to be seen walking after full-time anyway.
Local media reports have suggested Valencia will be fine to face Senegal, and with so much on the line here, don't be surprised if the veteran striker forces himself out on to the field.
Bolstered by the return of defender Abdou Diallo, Senegal were no match for Qatar last time out and have no concerns heading into this crunch clash.
The two teams will be meeting for just the second time, with the previous meeting being a friendly in 2002. Senegal recorded a 1-0 win with Raul Guerron's second-half own-goal being the difference.
There have been under 2.5 goals scored in Ecuador's last three games in the World Cup, while Senegal have seen over 2.5 goals in three of their last five games at the World Cup.
Ecuador have never faced an African team at the FIFA World Cup, while Senegal are winless in their two games against South American opponents.
Ecuador Starting 11 (4-4-2): Galindez; An. Preciado, Torres, Hincapie, Estupinan; Plata, Mendez, Caicedo, Ibarra; Valencia, Estrada.
Bench: Dominguez, Ramirez, Arboleda, Arreaga, Pacho, Porozo, Palacios, Gruezo, Cifuentes, Franco, Sarmiento, Ar. Preciado, Mena, Reasco, Rodriguez.
Senegal Starting 11 (4-2-3-1): Mendy; Sabaly, Koulibaly, Cisse, Diallo; Gueye, Mendy; Sarr, Dia, Diatta; Diedhiou.
Bench: Dieng, Gomis, Mendy, Ballo-Toure, Jakobs, N'Diaye, Gueye, Loum, Ciss, Name, Sarr, Kouyate, Ndiaye, Jackson, Dieng.
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