Juan del Potro defeated Great Britan's Andy Murray in a epic five-set thriller to kick off Argentina's Davis Cup World Group semifinal campaign to a winning start in Glasgow.
The 27-year-old Argentine claimed a gruelling 6-4, 5-7, 6-7 (5-7), 6-3, 6-4 win over Murray in his first Davis Cup singles rubber in four years on the hard-court of the Emirates Arena, Sport24 reported.
Del Potro produced a resilient performance to gain some revenge for his Olympic final defeat against gold-medallists Murray in Rio de Janeiro last month.
Argentina subsequently took a 2-0 lead in the Davis Cup after compatriot Guido Pella defeated Great Britain's Kyle Edmund in the second singles rubber.
Argentina need just one more victory from either Saturday's doubles or the two remaining singles on Sunday to eliminate the defending champions and secure a fourth final spot in the past 10 years.
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