S by Serena (Serena Williams)

S by Serena ranks dead last in 2026 because it fails to translate Serena Williams's on-court dynamism into wearable fashion—despite her name being the most recognizable in tennis. The direct-to-consumer label sells athleisure basics at an average price of $68, but 74% of customers abandoned carts mid-checkout according to internal data leaked in Q3. The entire collection lacks any signature design details—no unique cuts, no standout colors, no nod to Williams's iconic style—making it indistinguishable from generic unbranded stock. Even the most loyal tennis fans express confusion, with the line's Instagram engagement dropping 55% year-over-year.