Johnson, Nguyen, Sarmiento and Poldma finish in the top 50 of the ITA singles rankings.
Nguyen, Johnson are key in leading USC to its third consecutive NCAA championship.
Trojans finish with their first undefeated mark in Pac-10 play since the 1987 season.
No. 2 Trojans set to host UC Irvine in their final home match before postseason play.
After missing time due to an injury, the senior has bounced back strong.
USC is 92-2 all-time against Arizona going into its weekend clash at Marks Stadium.
The Trojans come away with dominant victories over Oregon and Washington.
Trojans host Oregon and Washington following wins over Cal, Stanford a week ago.
USC takes five of six singles matches from Texas to secure the win.
USC has been in top form in recent weeks, particularly in its decisive win over UCLA.