Medvedev, Zverev knocked out in first round of Rotterdam Open

Both players lost their respective contests in straight sets to Dusan Lajovic and Alexander Bulbik.

Medvedev walks up to shake Dusan Lajovic's hand, following his loss on Wednesday- GETTY IMAGES

Top-seeded Daniil Medvedev's 12 aces wasn't enough as the Australian Open runner-up was beaten 7-6 (4), 6-4 by Dusan Lajovic in the first round of the ABN AMRO World Tennis Tournament on Wednesday.

Medvedev had 25 unforced errors against Lajovic's 12, along with eight double faults, and he broke his racket in frustration. The third-ranked Russian last played Feb. 21 in his straight-sets loss to Novak Djokovic in the Australian Open final.

“I think I was very focused the whole match," Lajovic said. “This was the key today, not to make the little mistakes.”

The 30-year-old Serbian player faces Borna Coric of Croatia in the second round.

It wasn't the day's only upset in Rotterdam, with third-seeded Alexander Zverev also losing.

Alexander Bublik beat Zverev 7-5, 6-3 to set up a second-round meeting with Tommy Paul. Zverev, coming off a quarterfinal loss to Djokovic in Australia, went a break up in each set against Bublik but each time was then broken twice himself.

Sixth-seeded David Goffin needed just over an hour to beat Jan-Lennard Struff 6-4, 6-0. He'll meet qualifier Jeremy Chardy in the second round.

RESULTS Alexander Bublik, Kazakhstan, def. Alexander Zverev (3), Germany, 7-5, 6-3. Tommy Paul, United States, def. Lorenzo Sonego, Italy, 6-4, 7-6 (7). David Goffin (6), Belgium, def. Jan-Lennard Struff, Germany, 6-4, 6-0. Dusan Lajovic, Serbia, def. Daniil Medvedev (1), Russia, 7-6 (4), 6-4. Fabrice Martin and Jeremy Chardy, France, def. Lukasz Kubot, Poland, and Wesley Koolhof (3), Netherlands, 6-4, 6-3.