Wednesday 8 January 2020 14:14, UK
Novak Djokovic maintained his perfect start at the ATP Cup to help Serbia reach the quarter-finals, with the world number two improving to three singles wins and one doubles victory from four matches.
Djokovic, who has yet to drop a set at the tournament, beat Chile's Cristian Garin 6-3 6-3 in Brisbane.
Dusan Lajovic earlier broke Nicolas Jarry three times en route to a 6-2 7-6 (7-3) win, as the Serb finished the round-robin stage with a 2-1 singles record.
Serbia won Group A on Monday and, despite a loss doubles against Chile, will travel to Sydney to compete in the top eight.
Spain also progressed in Perth after world No 1 Rafael Nadal beat Japan's Yoshihito Nishioka 7-6 (7-4) 6-4 in a gruelling battle over two hours and eight minutes in Perth.
Nadal's team-mate Roberto Bautista Agut beat Go Soeda 6-2 6-4 as Spain topped Group B and set up a last-eight tie in Sydney on Friday.
Poland beat Dominic Thiem's Austria to finish second in Group E, with the world No 4 losing 6-3 6-4 7-6 (7-5) to Hubert Hurkacz.
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