Fluminense and Palmeiras clash at the Maracana for a spot in the Libertadores final

The Maracana is dressing up for a semifinal of the Copa Libertadores pitting two giants of Brazilian soccer against each other: Fluminense and Palmeiras are fighting for a place in the title conversation, and they're doing so in a series that, at least on paper, looks tighter than some expected.

Fluminense arrives at this matchup with a record of 3 wins, 4 draws and 3 losses in 10 tournament matches, scoring 11 goals and conceding 10. It's not a dominant campaign, and the recent form doesn't exactly calm the nerves either: of the last five matches, the side coached by Marcao won two and lost three, closing out with a defeat heading into this tie. Still, at home in this Copa Libertadores (a sample of five matches, separate from the overall record) the club averages 1.6 goals scored and just 0.8 conceded, with 40% of its matches ending in a clean sheet, and it tends to strike early, with its most productive offensive stretch coming between the 0th and 15th minutes.

Palmeiras, meanwhile, arrives with a steadier run in the tournament: 5 wins, 3 draws and 2 losses in 10 matches, with 15 goals scored and 9 conceded. The recent form backs that up too, with three wins, a draw and a loss in its last five outings. As a visitor in this Copa Libertadores (another five-match sample), Abel Ferreira's side scores 1.4 goals per game and allows 1, with 40% of matches finishing scoreless for the opponent, and it tends to show up right before halftime, between the 31st and 45th minutes.

How they got here

Fluminense's road to this stage ran through Independiente Rivadavia in the round of 16 (a scoreless draw at home and a 1-1 draw away that advanced them on the away-goals rule) and Platense in the quarterfinals, with a 2-0 win at the Maracana and a 1-2 loss in the return leg. Palmeiras, for its part, eliminated Cerro Porteno (a 1-1 draw at home and a 1-0 win on the road) and LDU Quito, with a 1-0 win in Brazil and a 2-3 loss in Quito. Both sides, then, arrive having come through tight series in the earlier rounds.

The head-to-head record offers no clear edge either: in 8 meetings, Fluminense has won 4, there has been 1 draw and Palmeiras has won 3, with 9 goals scored by the home side across those matches and 8 by the visitors.

Possible lineups

Based on recent matches, Fluminense could take the field with Fabio in goal, a back line of Julian Millan, Thiago Silva, Guilherme Arana and Guga, a midfield of Martinelli, Agustin Canobbio, Nonato, Yeferson Soteldo and Lucho Acosta, and Hulk leading the attack. It's worth noting this projection carries low reliability.

Palmeiras, with a higher-confidence estimate, would likely line up with Carlos Miguel in goal, Gustavo Gomez, Alexander Barboza and Murilo in defense, Lucas Evangelista, Andreas Pereira, Joaquin Piquerez and Agustin Giay in midfield, and an attacking trio of Jose Manuel Lopez, Jhon Arias and Vitor Roque.

What the numbers say

According to our model, Palmeiras is favored with a 40% probability, but the gap with Fluminense's 28% and the 32% chance of a draw is far from decisive: this is an open match. On top of that, an 80% probability points to both teams finding the net, while the chance of the match going over 2.5 goals sits at 40%. All of this is our own estimate based on the season's trends, not a betting line or a locked-in result.

With the Maracana as the stage and a series that, based on history and the numbers, has no clear owner, this semifinal promises to be decided by the small details. The field will provide the answers that the stats can only hint at.