Dhameystir weedha soo socota: Sanadkii 2015, Serena Williams waxay go'aansatay inay xilli ciyaareedkeeda ka bilowdo bandhigga dhacdada Perth,
Koobka Hopman oo ay la wadaageen John Isner, ayaa ku guuldareystay finalka oo ay ka badiyeen lammaanaha reer Poland ee Agnieszka Radwańska iyo Jerzy Janowicz. Australian Open, Williams waxay sheegatay inay ku guuleysatay 19-keedii slam iyada oo ka adkaatay Maria Sharapova, iyada oo dhigeysa tii labaad ee ugu badneyd ee ku guuleysata Open Era. Williams waxay soo afjartay 14-kii sano ee ay ku jirtay BNP Paribas Open laakiin waxay ka baxday ka hor kulankeedii semifinalka. Kadib waxay sheegatay horyaalkeedii siddeedaad ee Miami Open iyada oo ka adkaatay Carla Suárez Navarro 56 daqiiqo gudahood finalka kadib markii ay ku guuleysatay seddex kulan oo adag oo semi-final ah oo ay la ciyaartay Simona Halep. Kadib waxay gaartay finalka French Open waxayna sheegtay inay ku guuleysatay 20-keedii slam iyadoo ka adkaatay Lucie Šafářová saddex set, taasoo ka dhigaysa kaliya qofka labaad ee ku guuleysta slam kasta saddex jeer. Waxay ku taageertay iyada oo ku guuleysatay horyaalkeedii 6aad ee Wimbledon iyada oo ka soo horjeesatay Garbiñe Muguruza si ay u noqoto qofkii ugu horreeyay ee ku guuleysta seddex slam lix jeer iyo ciyaaryahankii ugu horreeyay tan iyo Steffi Graf oo ku guuleysata saddexda slam ee ugu horreeya sanadka. Williams ayaa ka soo laabatay dhaawac barroosho ah oo ka soo gaaray Toronto, laakiin waxaa la yaabay da'yarka Switzerland ee Belinda Bencic ee semi-finalka. Kadib waxay sheegatay horyaalkeedii shanaad ee sanadka ee Western & Southern Open iyadoo ka adkaatay Simona Halep. US Open, Williams waxay fursad u heshay inay ku guuleysato Grand Slam taariikheed laakiin waxaa ka careysiisay Roberta Vinci saddex set oo semi-finalka ah. Williams waxay ahayd saddex jeer horyaalka difaacaya, laakiin Oktoobar 2, Williams waxay ka baxday tartanka si ay u bogsato dhaawaceeda oo ay dib u hesho dhiirrigelinteeda.