Keys, a runner-up at the 2016 tournament in Montreal, matched Ana Ivanovic for the longest gap between quarterfinal appearances at the event in the Open Era. Keys had not made it past the second round in Canada since losing to Simona Halep in that final nine years ago.

Madison Keys has advanced to the quarterfinals of the National Bank Open. The sixth-seeded American rebounded from a one-set deficit to beat Czechia's Karolina Muchova 4-6, 6-3, 7-5 on a windy Sunday afternoon at IGA Stadium's Centre Court.

Iga Swiatek of Poland plays a forehand against Clara Tauson of Denmark during their fourth round singles women's match at the National Bank Open at IGA Stadium on Sunday in Montreal. Minas Panagiotakis/ Iga Swiatek’s National Bank Open has come to an end in the fourth round.