LA Galaxy past Chivas 2-0 in first soccer match at SoFi Stadium
The winner will receive an automatic berth in the round of 16 of CONCACAF Champions League.
Joveljic, a Serbian national team player, stuck out his left foot to redirect a corner kick by Efrain Alvarez into the top netting in the 28th minute.
With sideline space at a premium because of field-level suites, Alvarez had no choice but to put in an in-swinging ball, and Joveljic got to the near post ahead of two Chivas defenders to put the Galaxy ahead.
Perez made it 2-0 in the 63rd minute with a well-struck shot from outside the penalty box that beat Raul Rangel to the lunging goalkeeper's left.
"Jonny obviously steals the show with a great goal. The kid's a special player,'' Vanney said.
He intercepted a poor back pass by Antonio Briseno after 15 seconds but could not get a shot away before Rangel made a desperation slide tackle.
Chivas had its own chances to score early on, the most dangerous forcing Jonathan Klinsmann to make consecutive reaction saves to deny Miguel Ponce from close range in the 25th minute.