US Open champion Coco Gauff dominated Varvara Gracheva, securing a swift 6-1 6-1 victory in the Auckland Classic quarter-finals, setting the stage for a semi-final clash with compatriot Emma Navarro.
Gauff, 19, showcased a stellar performance in just 52 minutes, signaling her form ahead of the Australian Open, which commences on January 14.
Meanwhile, British player Harriet Dart reached the Canberra International final, defeating American Katie Volynets 7-5 3-6 7-5 in the WTA 125 series, positioning herself for a potential return to the top 100.
Dart, 27, will face Spain's Nuria Parrizas Diaz in the Canberra International final before heading to Melbourne for Australian Open qualifying.
Gauff, on the other hand, aims to defend her Auckland Classic title and expressed satisfaction with her improved serving, a focus during the off-season.
Although Gauff has yet to advance beyond the fourth round at the Australian Open, her current form suggests a strong start to the year.
In other tennis action, world number four Elena Rybakina and two-time Australian Open champion Victoria Azarenka advanced to the Brisbane International semi-finals.
Rybakina, from Kazakhstan, progressed to face Linda Noskova after Anastasia Potapova retired in the quarter-finals due to a stomach problem.
Belarusian Azarenka, a former Australian Open winner, secured a hard-fought victory against Latvian Jelena Ostapenko, winning 6-3 3-6 7-5 in a match lasting two hours and 30 minutes.