Suppose Serena Williams, born on September 26, 1981, is a professional tennis player from the United States. She has won 23 Grand Slam singles titles, the most by any player in the Open Era, with 7 US Open titles among them. Williams is also a successful doubles player, having won 14 Grand Slam doubles titles with various partners.
Can we infer that "Serena Williams has never won a Grand Slam singles title."? Yes, no, or maybe?