Not since February 2016 has Dominic Thiem been to a hardcourt semi-final, but he has ended that run at the Qatar Open.
John Millman came agonisingly close to a Brisbane International upset, but Grigor Dimitrov showed his class to reach the last eight.
Syndey International organisers hoped to entice Serena Williams, but the American declined with the Australian Open looming.
After pulling out of the Australian Open, we look at Andy Murray's rise to world number one and subsequent injury fall.
Switzerland duo Roger Federer and Belinda Bencic won all nine of their Group B matches to reach the Hopman Cup final in style.
Kaia Kanepi almost pulled off an upset against Karolina Pliskova, but the Czech rallied to reach the Brisbane International semi-finals.
Top seed Simona Halep and former world number one Maria Sharapova sealed straight-sets wins to reach the Shenzhen Open semi-finals.
Inclement weather meant no play was possible in the Auckland Open on Thursday, so the quarter-finals will be staged on Friday.
Still struggling with a hip injury, Andy Murray has opted to withdraw from the 2018 Australian Open.
Australian Open tournament director Craig Tiley believes Novak Djokovic, Rafael Nadal and Serena Williams will play in Melbourne.