Amanda Anisimova downs Iga Swiatek in thriller to join Elena Rybakina in WTA Finals semis
Iga Swiatek bemoans 'karma' after WTA Finals round-robin exit
Tennis Tracker: Anisimova beats Swiatek to reach WTA Finals semis, Musetti through in Athens
Musetti downs Wawrinka to reach Athens quarter-finals and keep ATP Finals bid alive