Former U.S. Open champion Emma Raducanu has withdrawn from an Auckland tournament, saying a back injury she has been nursing in recent weeks had not improved as much as she hoped.

Grand Slam winner Emma Raducanu has pulled out of the Auckland Open with a back problem in a setback for her preparations for the Australian Open. Raducanu, seeded sixth in the Auckland warmup, was due to play American Robin Montgomery in the first match of the evening session later on Tuesday.

Germany's world number two Alexander Zverev pulled out of the United Cup on Wednesday with a bicep strain barely a week away from the Australian Open.

PERTH – World No. 2 Alexander Zverev pulled out of the United Cup on Jan 1 with a bicep strain, in what is a concern for the German star barely a week away from the Australian Open. The 27-year-old won his opening two games of the season against Brazil’s Thiago Monteiro and China’s Zheng Zhizhen.

No. 2-ranked Alexander Zverev withdrew from the United Cup mixed teams tennis tournament on Wednesday with a biceps strain less than two weeks from the start of the Australian Open