Rafa Nadal returned from an injury layoff to beat Miomir Kecmanovic 6-1 7-6(4) on Wednesday and reach the last 16 in the Madrid Open clay-court tournament.
Nadal, competing in his first match since March following a rib injury, quickly found his rhythm in a strong start against Serbian Kecmanovic.
Rain suspended play early in the second set and 21-time Grand Slam champion Nadal lost momentum.
The 35-year-old Spaniard, hitting with explosive power, recovered from failing to serve out the match at 6-5 in the second set to seal victory in just under two hours.
Nadal, who improved his win-loss record to 21-1 for the season, is aiming to win his sixth title on home soil in Madrid having last won the tournament in 2017, and will next play qualifier David Goffin.
Earlier, world number three Alexander Zverev overcame a slow start to beat Marin Cilic 4-6 6-4 6-4, while qualifier Dusan Lajovic beat fifth seed Casper Ruud 7-6(7) 2-6 6-4.
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