Argentina's two most storied soccer clubs were on display Sunday in Southern California, with River Plate drubbing Mexican champion UNAM in San Diego and Boca Juniors playing CD Guadalajara even in Los Angeles.

River Plate's contentious 4-1 victory drew about 25,000 to Qualcomm Stadium. The Boca Juniors-Chivas match, packaged with a Guatemala-El Salvador duel, lured an estimated 21,000 to the Coliseum.

None of the club teams were at full strength, primarily because of Copa America. Guadalajara was missing nine regulars.

Jose Sand and Nelson Cuevas each scored a goal and set up another for River Plate, which won its 27th Argentine championship last season.

UNAM, which got its goal on Jose Ailton's 71st-minute penalty kick, lost Dario Veron to his second yellow card in second half, and Coach Hugo Sanchez was sent off in the 80th minute.

River Plate and UNAM meet again Saturday at the Rose Bowl in Pasadena, Calif.

To the north, Argentine runner-up Boca Juniors tied Mexican runner-up Guadalajara, 1-1, after a horrendous error by Chivas goalkeeper Alfredo Talavera.

Fernando Camacho fired Chivas ahead in the ninth minute, a 20-yard blast off the underside of the crossbar. Six minutes later, Talavara gave the ball away in his area to Ariel Carreno, who easily finished the chance.

After the game, Guadalajara winger Ramon Ramirez confirmed he would play for Chivas USA, the MLS expansion team that is expected to announce this week that it will play at the Home Depot Center in Carson, Calif., just a few miles south of the Coliseum.

Boca Juniors and Chivas play again Wednesday in Denver, and Boca faces Club America on Friday in San Francisco.

Guatemala beat El Salvador, 1-0, in the second game of the doubleheader, with Henry Medina heading home Guillermo Ramirez's free kick just before halftime.

The set piece, just outside the box, was awarded after former Dallas Burn midfielder Jorge Rodriguez was red-carded for tripping Zacarias Antonio. Medina ran into open space along the 6, nodding the ball toward the upper-left corner.

Referee Ricardo Valenzuela also issued seven yellow cards.

On Saturday in Chicago, Necaxa beat Mexican rival Morelia, 2-1, as Miguel Acosta and Fabian Pena scored second-half goals. The match was part of a doubleheader, with the Chicago Fire-MetroStars MLS game, played before 20,754 at Soldier Field.

SUMMARIES
June 18 at Los Angeles

Guadalajara (Mexico) 1 Boca Juniors (Argentina) 1. Goals: Camacho 9; Carreno 15.

Guadalajara — Talavera; Alfaro (Morales, 63), Reynoso, J. Garcia, Salcido, Ramirez (Aguayo, 80); Medina, Sol, Vela (Ramos, 90); Sabah, Camacho (Mendoza, 73).

Boca Juniors — Caballero; Alvarez, Schiavi, Gonzalez, Calvo; Ledesma; Cagna, Vargas, Guglielmimpietro (Cardozo, 69), Cangele (Boselli, 89), Carreno (Marinelli, 85).

Yellow cards: Guadalajara — Sabah 28, Reynoso 36, Medina 77; Boca Juniors — Schiavi 34, Marinelli 91+.

Referee: Terry Vaughn (U.S.).

Guatemala 1 El Salvador 0. Goal: Medina 42.

Guatemala — Garcia; N. Martinez, Medina, Melgar, Sanabria; Thompson (Pereira, 79); Antonio, Ramirez (Romero, 46), Davila (Cabrera, 80); Pezzarossi (Estrada, 46), Montepeque (Urtarte, 87).

El Salvador — Rivera; Velazquez, Gonzalez (J.M. Martinez, 72), Guevara; Murgas, J. Rodriguez; Torres (Escobar, 65), Prado, Nerio Miron; Gochez (Merino, 57), J.O. Martinez.

Yellow cards: Guatemala — Davila 33, Pezzarossi 36, Sanabria 47, N. Martinez 71; El Salvador — J. Rodriguez 12, Gonzalez 18, Prado 31.

Red card: El Salvador — J. Rodriguez 40.

Referee: Ricardo Valenzuela (U.S.).

Att.: 21,000 (est.)

Other Results

June 17 at Chicago
Necaxa (Mexico) 2 (Acosta 65, Pena 76) Morelia (Mexico) 1 (Alvarez 26)

June 18 at San Diego
River Plate (Argentina) 4 (Sand 9, Pereyra 29, Luduena pen. 70, Cuevas 80) Pumas UNAM (Mexico) 1 (Ailton pen. 71)

UPCOMING GAMES
July 21: Guadalajara (Mexico) vs. Boca Juniors (Argentina) at Denver
July 23: America (Mexico) vs. Boca Juniors (Argentina) at San Francisco
July 24: River Plate (Argentina) vs. UNAM (Mexico) at Pasadena, Calif.
July 24: Celtic (Scotland) vs. Chelsea (England) at Seattle
July 25: Manchester United (England) vs. Bayern Munich (Germany) at Chicago
July 25: Guadalajara (Mexico) vs. Santos (Mexico) at Dallas
July 26: Celtic (Scotland) vs. Liverpool (England) at Hartford, Conn.
July 28: Manchester United (England) vs. Celtic (Scotland) at Philadelphia
July 29: Chelsea (England) vs. AS Roma (Italy) at Pittsburgh
July 29: Everton (England) vs. Pachuca (Mexico) at Houston
July 30: FC Porto (Portugal) vs. Liverpool (England) at Toronto
July 31: Manchester United (England) vs. AC Milan (Italy) at East Rutherford, N.J.
July 31: Celtic (Scotland) vs. AS Roma (Italy) at Toronto
Aug. 1: Club America (Mexico) vs. Everton (England) at Houston
Aug. 1: FC Porto (Portugal) vs. Galatasaray (Turkey) at East Rutherford, N.J.
Aug. 2: Chelsea (England) vs. AC Milan (Italy) at Philadelphia
Aug. 3: Liverpool (England) vs. AS Roma (Italy) at East Rutherford, N.J.