**Three players—Connor Syme, Eugenio López-Chacarra, and Grant Forrest—shared the first-round lead at the 2026 Open de España with matching 5-under-par 66s at Real Club de Campo Villa de Madrid, producing the tight implied probabilities.** Syme opened with back-to-back birdies and a long putt on the back nine before adding another on the front; Forrest recovered from early bogeys with a closing birdie surge; and home favorite Chacarra posted two eagles despite a fractured toe. These comparable rounds on the par-71 layout, amid a strong international field, created a dead heat for first-round leader that reflects evenly matched opening-day form and course conditions rather than any single standout advantage.