Jantje Tilbuerger enters the W15 Hilton Head Island quarterfinal as the clear favorite due to her ITF ranking near 742, stronger recent form with straight-set wins over Shumate and Diianni on clay, and greater professional experience compared to the 16-year-old wildcard Scarlett Fagan. Fagan has shown promise with victories in earlier rounds but faces a significant step up in opponent quality and consistency. Trader consensus at near-certainty levels reflects these established gaps in ranking, match toughness, and head-to-head context on the surface. Even with such pricing, a late withdrawal, illness, or unexpected injury to Tilbuerger before the first ball could still shift resolution, as can any on-court medical timeout or weather delay on the outdoor clay courts.