Rafael Nadal books place in quarter-finals of Mexican Open
Stan Wawrinka, Grigor Dimitrov and John Isner were also among the winners in Acapulco.
Last Updated: 27/02/20 2:53pm
Rafael Nadal beat Miomir Kecmanovic in straight sets to reach the quarter-finals of the Mexican Open.
The world No 2 saw off his 20-year-old opponent 6-2 7-5 in one hour and 35 minutes to set up a last-eight clash with Kwon Soonwoo, who stunned eighth seed Dusan Lajovic 7-6 (7-2) 6-0.
Nadal won the first five games of his match and, after failing to serve out the set, he immediately broke back to secure the opener.
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The second set remained on serve until the eighth game, when Nadal took his second break point.
Kecmanovic, the world No 50, broke back but the 19-time grand slam champion stepped it up in the final game to break again and secure victory.
Earlier, second seed Alexander Zverev was stunned by American qualifier Tommy Paul, with the world No 66 winning 6-3 6-4.
Grigor Dimitrov beat Adrian Mannarino in a final-set tie-break while American duo John Isner and Taylor Fritz were also second-round winners in Acapulco and Stan Wawrinka beat Spain's Pedro Martinez 6-4 6-4.