Arsenal de Sarandi have lost to Argentinos Juniors 1-2 in the last round of the league. They lost 2 of their last 3 matches.
On the other hand, River Plate rank near the top of the table, with 5 wins, 2 draws and 2 defeats.
Besides, River Plate have won 2 league games in a row, with good recent form.
The AH opening line is -0.25 for the away side.
Thus, the visitors are expected to win.