Rafael Nadal overcame giant American Reilly Opelka to claim an 18th consecutive win this season on his way to the quarter-finals at Indian Wells on Wednesday.
Nadal, a three-time champion in the desert, became the second player in ATP Tour history to start a season 18-0, edging Opelka 7-6 (7-3) 7-6 (7-5).
Only Novak Djokovic has made a better start to the season when he went 26-0 to begin 2020 and 41-0 to open 2011.
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Unseeded Serbian Miomir Kecmanovic stunned world No 6 Matteo Berrettini 6-3 6-7 (5-7) 6-4 to set up a quarter-final meeting with American Taylor Fritz.
Serbian Kecmanovic absorbed his opponent's power serve in the first set, converting on a break-point chance in the fourth game, as a frustrated Berrettini won just eight return points.
But Kecmanovic, 22, was unable to close out the match as a break-point opportunity slipped through his fingers late in the second set, in which Berrettini, who reached his first Grand Slam final at Wimbledon last year, struck 21 winners and won a tense tie-break to level.
Berrettini saved two breaks in the eighth game in a tightly fought final set to stay alive but Kecmanovic pounced to break the Italian's serve to love in the final game.
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He will next play Fritz who outlasted Australian Alex de Minaur 3-6 6-4 7-6 (7-5).
Australian Nick Kyrgios advanced by walkover after Italian Jannik Sinner withdrew from the tournament due to illness.
Grigor Dimitrov made it through to the quarter-finals for the second year running after he beat John Isner 6-3 7-6 (7-6).
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