Top seeds Dominic Thiem of Austria and Italy’s Fabio Fognini and Marco Cecchinato have been ousted in the first round of the Rio Open clay-court tournament.

No.1 seed Thiem lost to Serbia’s Laslo Dere 6-3 6-3, while second seed Fognini was defeated by Canadian Felix Auger Aliassime 6-2 6-3.

Third seed Cecchinato, who won the Argentina Open on Sunday, was also eliminated by Slovenia’s Aljaz Bedene 7-5 7-6 (1).

The fifth and sixth seeds also lost their matches.

Portugal’s Joao Sousa was defeated 4-6 6-3 6-4 by Argentina’s Guido Pella and Serbia’s Dusan Lajovic lost to Britain’s Cameron Norrie 6-2 6-1.

Argentina’s Diego Schwartzman, who is the fourth seed and defending champion, was scheduled to play later on Tuesday.