Australia’s Maddison Inglis has exited the WTA Tour’s Thoreau Open in the opening round after retiring midway through her match with No.3 seed Madison Brengle.
The American was leading 6-3 3-0 when the world No.146 Inglis called it a day.
Brengle will now meet Switzerland’s Lulu Sun, who beat Japan’s Kurumi Nara 6-1 6-3 in the round of 16.
Queenslander Lizette Cabrera also bowed out of the WTA 125 event, but not without a fight.
Brazil’s Beatriz Haddad Maia battled for two hours and 37 minutes before squeezing past the Townsville star 6-4 3-6 6-4.
Seventh seed Greet Minnen also made it through after a 6-4 6-1 victory over Leonie Kung, but Christina McHale, who was seeded six, is out after a 6-4 6-3 defeat by Spaniard Cristina Bucsa.
Grace Min came out on top in her all-American battle with Sophia Whittle, edging a tight first set 7-6 (7-3) before taking the second 6-1.
At the Mubadala Silicon Valley Classic in San Jose, sixth seed Petra Martic won 6-3 6-3 against Latvia’s Anastasija Sevastova to book a round of 16 encounter with Pole Magda Linette, who won by the same scoreline over Dutch player Lesley Pattinama Kerkhove.
Croatia’s Ana Konjuh had a tough 7-5 3-6 7-5 win over the Czech Republic’s Marie Bouzkova and will next play Alison Riske, who beat fellow American Coco Vandeweghe 6-3 6-4.
Britain’s Emma Raducanu, playing in her first tournament since her memorable Wimbledon run, crashed out in the first round 6-3 6-2 to China’s Zhang Shuai.
In the day’s final encounter France’s Caroline Garcia prevailed over American Emina Bektas 6-3 6-4.