Cobreloa vs San Marcos de Arica: match prediction on 1 September 2026

Cobreloa are the clear favourites at 1.79, a price set by 43 bookmakers who also put the draw at 3.37 and San Marcos de Arica at 3.95. The market strips those margins to 50% for a home win, 27% for a stalemate, and 23% for the visitors. That split makes sense when you look at what each side has done since August. Cobreloa sit second with 38 points from 21 matches, while San Marcos de Arica languish in ninth with 30. The hosts have won ten, drawn eight, and lost three. The visitors have seven wins, nine draws, and five defeats. The eight-point gap tells the story of two teams moving in opposite directions.

Form is where the difference becomes stark. Cobreloa's last five games produced one victory, three draws, and one defeat — six points from a possible fifteen, with four goals scored and four conceded. Their most recent outing ended 1-0 away at Union San Felipe on 16 August. Before that came a 2-2 draw at Magallanes CF on 12 August, a 1-1 home stalemate with Deportes Iquique on 8 August, and a goalless draw away at Curicó Unido on 1 August. The only loss came 0-1 at home to Unión Española on 22 August. San Marcos de Arica have managed one point from their last five matches — a single draw against Santiago Wanderers away on 8 August. Four losses followed: 1-2 at home to Rangers de Talca on 22 August, 1-2 away at Unión Española on 16 August, 0-1 at home against Union San Felipe on 13 August, and 0-1 away at Coquimbo Unido in the Copa Chile on 6 August. They have scored three and conceded seven in that span.

The head-to-head record shows a pattern that does not guarantee today's result but suggests Cobreloa's edge. The most recent fixture was an away defeat for Cobreloa — 2-1 to San Marcos de Arica on 18 April 2026 in the Primera B. Before that, Cobreloa won 3-1 at home on 30 November 2025 in the Primera División, then lost 2-1 away on 26 November 2025 in the same competition. They won 2-0 at home on 19 July 2025 in the Primera B, drew 1-1 away on 1 March 2025 in the Primera B, and drew 0-0 at home in the Copa Chile on 29 June 2024.

The model expects Cobreloa to score 1.6 goals and San Marcos de Arica to score 0.9. The draw probability sits at 25%, both teams to score at 48%, and three or more goals at 46%. The three most likely scorelines are 1-0 at 13%, 1-1 at 12%, and 2-0 at 10%. Cobreloa have scored 32% of their 19 goals in the 31-45 minute period, while San Marcos de Arica have distributed their 16 goals more evenly, with 25% in the 31-45 minute block and another 25% in the 61-75 minute period. Both sides have conceded heavily in the final quarter of an hour — 23% for Cobreloa and 27% for San Marcos de Arica.

Cobreloa to win, backed by the eight-point gap in the table, the visitors' winless run of five matches yielding one point, and the model's expectation that the hosts will outscore their opponents. The price of 1.79 reflects that assessment. If San Marcos de Arica find a way to keep the game tight and exploit the moments when Cobreloa have been vulnerable — particularly in the 61-75 minute period, where the hosts have conceded 23% of their goals, or in the final twenty minutes, where they have let in another 23% — the prediction would not hold. A draw is a plausible alternative for the visitors, representing the main threat to a home victory.