Dario Cvitanich scored a 50th-minute equalizer to rescue a 1-1 home draw for Boca Juniors in the Buenos Aires derby with San Lorenzo on Sunday.

A Gabriel Mendez' free kick put San Lorenzo ahead on the half hour mark, but Cvitanich leveled with a second-half header.

The result left Boca tied on eight points with Racing Club and Lanus, behind surprise early leader Atletico Rafaela by one point after four games.

In other results Sunday, Union had a 2-0 win at Colon in the Santa Fe derby, Newell's Old Boys came from two down to win 3-2 at Belgrano, and Argentinos Juniors and Independiente drew 0-0.

Meanwhile, River Plate tops the second division with three wins out of three after beating Desamparados 3-1 on Saturday.

In the top flight, newly promoted Belgrano took an early two-goal lead against Newell's with strikes from Gaston Turus in the 8th minute and Juan Maldonado in the 14th.

Victor Aquino began Newell's fightback with a goal just before half time and Ricardo Noir hit quickfire goals in the 67th and 69th to complete the comeback.

In Santa Fe, Paulo Rosales and Fernando Montero put Union two goals ahead inside the first 20 minutes at cross-city rival Colon.

The home side's hopes of rallying were snuffed out in the 82nd minute when Ivan Moreno was sent off.

In other results Friday and Saturday, it was: Lanus 0, Tigre 0; Atletico Rafaela 3, Olimpo 1; Velez Sarsfield 0, All Boys 1; Godoy Cruz 1, Banfield 0; Estudiantes 2, San Martin 2; Racing Club 0, Arsenal 0.