Pacific is two strokes out of the top 10. Austin Fox and Casey Scott led the way for the Tigers. Fox was two-under par in the first round.
Nederstigt finishes runner-up in the doubles final.
Watson and El Sallaly competed in bonus matches on day three of Battle in the Bay.
Pacific scored four goals in the first half against UC Irvine to make it five matches without a loss. Tariq Branche scored twice and Jonathan Jimenez had a goal and two assists.
The Tigers fell in double overtime despite Isabella Pariente's first career goal
No. 24 San Diego swept Pacific, 3-0, on Saturday afternoon.
A 4-1 first period outing by the Orange and Black fell just short against top-ranked USC on Saturday
Nederstigt competes in doubles final and both freshman battle each other in the singles consolation final on Sunday.
Watson and El Sallaly to compete in bonus matches on Sunday.
The Tigers handed the Cardinal its first loss in nearly a year and ended a 21-match win streak thanks to a strong defensive performance and an early goal from Jonathan Jimenez.