San Diego Open (tennis)
| San Diego Open | |||||||
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| Tournament information | |||||||
| Founded | 1971 | ||||||
| Location | San Diego, California, United States | ||||||
| Venue | Omni La Costa Resort & Spa (2004–2015) Barnes Tennis Center (2021–present) | ||||||
| Surface | Hardcourt / Outdoor | ||||||
| Draw | 28S / 24SQ / 16D | ||||||
| Website | Website | ||||||
| Current champions (2026) | |||||||
| Men's singles | Zachary Svajda | ||||||
| Women's singles | Elvina Kalieva | ||||||
| Men's doubles | Trey Hilderbrand Mac Kiger | ||||||
| Women's doubles | Kayla Cross Alana Smith | ||||||
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The San Diego Open is an annual professional tennis tournament on the ATP Challenger Tour and ITF Womens Circuit, held in San Diego, California, at the Barnes Tennis Center. Since 2025, it is an ATP Challenger 100 event when the WTA 500 event was cancelled. Since 2026 it is also an ITF W100 tournament.