Alexander Zverev spoiled David Ferrer's return to the Rotterdam Open on Monday with a comfortable 6-4 6-3 victory over the Spaniard.
Ferrer had never lost to the 20-year-old in their two previous meetings but the third seed – who reached the quarter-finals in 2016 – quickly put that right, winning in 86 minutes.
So dominant was Zverev that he raced into a 4-1 lead as Ferrer, playing in Rotterdam for the first time since 2011, struggled to hold his own serve, while also wasting six break points on his opponent's.
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To bookend the match nicely Ferrer also finished with a slump, losing four in a row as Zverev cruised into round two and a meeting with Andreas Seppi - who beat Joao Sousa 6-4 1-6 6-2.
"It was good, David is not easy to play against, it is unusual for a top-10 player to play someone like him in the first round," said Zverev. "But this is a very tough week.
"I was trying a little bit more variation in my game, that's what I'm working for. I want to make my game a bit more than one-dimensional.
"A lot worked, some didn't, but all in all I'm happy with a first round like that."
Tomas Berdych made it 18 wins from his last 22 matches in Rotterdam with a 7-5 6-3 win over Zverev's older brother Mischa.
After a shaky start the 2014 winner served superbly, winning 82 per cent of his first serve points and turned around a 5-3 deficit in the opening set.
Monday's remaining match saw 2016 champion Martin Klizan beaten by Feliciano Lopez, the Spaniard winning 6-3 7-6 (7-4).