Andy Murray suffered a shock exit at the hands of Federico Delbonis in the third round of the BNP Paribas Open .
World number two Murray, who helped Great Britain to a Davis Cup win over Japan last week, lost a third-set tie-break to bow out at Indian Wells.
The Scot, playing in his first singles tournament since his Australian Open final defeat to Novak Djokovic, dropped the first set 6-4.
He had to dig deep at 4-4 in the second, and a couple of trademark drop volleys secured the set 6-4.
Murray then broke Delbonis in the third game of the decider, only for the world number 53 to break back in the seventh.
Delbonis won a marathon 11th game to take a 6-5 lead, but Murray broke straight back to force the tie-break.
However, the Argentinian went on to secure the biggest win of his career when he won the tie-break 7/3.
Delbonis will play either Gael Monfils of France or Spain's Albert Ramos-Vinolas in the fourth round.
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