ROHNERT PARK, Calif. -- No. 10 UC San Diego won its opening match at the Sonoma State Invitational Thursday, taking down Hawai'i Hilo, 5-4, to remain unbeaten at 18-0.

The Tritons won four of the six singles matches, while the Vulcans took two of three doubles match-ups.

UCSD senior Erik Elliott won his No. 1 singles match in straight sets, 6-2 and 6-3, over Stephen Royalty. It was his sixth consecutive win at No. 1, his last loss coming against Hawai'i Pacific's Petr Michnev on March 12.

Senior Vincent Nguyen's No. 4 singles match went to three sets. He won the opening frame, 6-2, over Vulcan Bryan Canavan, but fell in set two, 3-6. Nguyen battled to a gritty 6-4 victory in the third to give him the match.

Also picking up singles wins were Austin West at No. 5 and Max Jiganti at No. 6. West defeated Kallen Mizuguchi, 6-3, 6-0, while Jiganti topped Matthew Tavares, 6-2 and 6-1. Jigante had a winning day as he and Armaun Emami teamed at No. 3 doubles to beat Mizuguchi and Carlos Quijano, 8-3, UCSD's lone doubles win.