The teams will meet at 10 a.m. ET on Monday in their final 2018 FIFA World Cup Group A game.
32 will soon be officially cut down to 16, in a final wave of fixtures that promises plenty of drama, relief and heartbreak for the nations involved. On the other hand, a draw will be sufficient to put Portugal through, however, Ronaldo and co. will desperately look for a win which will help them finish atop group B.
Mohamed Salah is likely to start Egypt's final match against Saudi Arabia on Monday in a fixture between two eliminated sides in Volgograd.
In Group A, Russian Federation will bid for a third straight win after a stunning start to the tournament for a side initially written off as no-hopers. Some have already been eliminated. If they win by the same score, or record identical draws, the disciplinary tiebreaker comes in, where Spain has one yellow card to Portugal's two, so Spain would top the group.
Portugal aren't without creativity, but they can't dissect a back line in the same way La Roja can, so they might struggle here if they're not able to grab an early goal again.
Iran can only advance to the next stage of the World Cup if it beats the European champions. If Spain and Portugal are on the same points, goal difference and goals scored (as they are now) it will come down to the sides' fair play record to determine who finishes above who. Over in Group A, Russian Federation and Uruguay are through, but top spot is up for grabs as they go head to head. Australia must win to stand a chance, but surely fear that France and Denmark will play out a tepid draw like the Disgrace of Gijón. Nigeria will be buoyed by their victory over Iceland and a win against a shambolic-looking Argentina will secure them a spot in the knockout stages. The Argentines would survive with a win and an Iceland loss or draw.
Brazil, Switzerland and Serbia are in contention for the two places.
The evening kicks off with group A's decisive games: Uruguay v Russian Federation in Samara and the dead rubber of Saudi Arabia v Egypt in Volgograd.
Germany, who face bottom side South Korea, need to at least match Sweden's result. After taking a single point from their first two matches in Group D, Lionel Messi & Co. need to produce a winning display against Nigeria to stay in the tournament. Win and they're through.
However, complicated three-way ties are possible, for either places 1-3 (if Sweden beats Mexico AND Germany beats South Korea) or places 2-4, (if Mexico beats Sweden AND South Korea beats Germany). The victor takes it. England are ahead on the disciplinary front with one fewer yellow card than Belgium. Wins for Iceland and Argentina means tiebreakers. Colombia will qualify with victory over Senegal, possibly at the Africans' expense depending on the result of the match between Poland and Japan.