Alycia Baumgardner's career will be defined by her recent positive drugs test, according to arch rival Mikaela Mayer. "I feel sorry for her," Mayer told talkSPORT this week. "This is her legacy now." 33-year-old Top Rank fighter Mayer fought Baumgardner at a historic, female-led event last year but lost via split decision. Baumgardner continued to ride that winning momentum by out-pointing Elhem Mekhaled and Christina Linardatou in back-to-back fights this year, with the latter a rematch as she avenged the sole defeat on her resume. Baumgardner, the undisputed female super featherweight world champion, tested positive for two banned substances during a voluntary anti-doping test prior to that last win, promoter Matchroom said in a statement to media. Mayer herself returns to the ring for the first time this weekend following her loss to Baumgardner, and commented on her former opponent's drugs test ahead of her date with Silvia Bortot at the Manchester Arena in England, for a Boxxer show that Liam Smith and Chris Eubank Jr. are headlining. "It's obviously very disappointing," said Mayer. "You always wonder — how long has she been doing that? Was this the first time, or was this the first time she got caught?" Baumgardner, meanwhile, has long pleaded her innocence. Baumgardner tested positive for mesterolone and methenolone acetate metabolites, and said these were "two substances I've never heard of or used in any way" in a statement posted on social media. "To be abundantly clear, I know that I never have, never would, and never will take this or any other drug. "Not only would doing so be unethical, but it would also be completely contrary to how I've trained my entire career."