- World No 1 brushed aside wrist concern to beat Jiri Lehecka
- Serbia scrape past Czech Republic to set up tie against Australia
Novak Djokovic has battled his way through a wrist injury as Serbia secured a dream United Cup quarter-final showdown with Australia on a day of high drama and confusion in Perth.
The world No 1 was troubled by his right wrist during practice on Tuesday morning, with the injury requiring intense treatment from his physio. Djokovic was cleared to play his singles match against Jiri Lehecka later in the day. It was just as well for Serbia after Wimbledon champion Marketa Vondrousova defeated Olga Danilovic 6-1, 3-6, 6-3 to give the Czech Republic a 1-0 lead in the tie.