Persib lost 0-3 when hosted by Ratchaburi FC in the first leg of the round of 16 of the AFC Champions League (ACL) II at Ratchaburi Stadium, Na Muang, Wednesday night.
Two goals from Pedro Tana and one from Gabriel Mutombo saw Ratchaburi beat Persib, according to AFC records.
Persib faces a tough challenge: qualify for the ACL II quarter-finals by winning by at least four goals in the second leg next week.
Ratchaburi took an early lead just five minutes into the match after Deni Junior's cross was converted into a goal by Pedro Tana.
Persib tried to equalize and had a chance from Uilliam Barros which was right at Ratchaburi goalkeeper Kampol Pathomakkakul.
