Santa Clara's Jeffrey Cosgriff broke the stalemate in the 70th minute and it appeared the goal would hold until Villanueva's equalizer.
Arsenal FC moved one step closer to achieving its goal of a four-peat after beating Nebraska FC, 3-1. Cal-bound Davis Paul led the So Cal powerhouse with a goal and an assist.
Hamoody Saad was the hero for the Michigan Wolves with both goals in a 2-1 win over two-time defending champion Real So Cal in U-16 boys play.
Robert Barrera had a hat trick for PDA Larsson in its 4-2 win over Lonestar Red in boys U-15 play.
The Chicago Magic (U-19), Arsenal FC, the Michigan Wolves and PDA Larsson are the only boys teams with 2-0 records after two games.
On the girls side, the stars of the day were Melissa Henderson of the U-17 Dallas Texans Red and Jessica Howard of the U-14 Sting Royal, another Dallas power, with hat tricks.
The Dallas Texans Red and Eagles are both 2-0 in U-17 girls play and their match on Friday is just a tuneup to the final on Sunday.
The U-16 McLean Freedom and U-14 Slammers FC are the only other unbeaten and untied girls teams after Day 2.