Amanda Anisimova downs Iga Swiatek in thriller to join Elena Rybakina in WTA Finals semis
Gauff eases past Paolini to breathe life into Finals defence, Sabalenka downs Pegula
Tennis Tracker: Anisimova beats Swiatek to reach WTA Finals semis, Musetti through in Athens
Iga Swiatek bemoans 'karma' after WTA Finals round-robin exit