Only Brazilian left in the main draw of the Rio Open presented by Claro, Thiago Monteiro lost the chance to reach his third quarterfinal at the ATP 500 event this Wednesday.

In a more-than-three-hour match, Monteiro was defeated by qualifier Chun-Hsin Tseng, who posted the biggest win of his career in the first round in Rio versus world number 28 Alejandro Tabilo. Tseng won by 6/7, 6/3 and 7/6 to advance to the quarterfinals.

This is his second ATP Tour quarterfinal, the first above the ATP 250 level after 2024 Umag. Tseng is only the second player representing Chinese Taipei to reach an ATP 500 quarterfinal.

The qualifier now takes on Sebastian Baez in the next round. “To be honest I don’t know who I’m playing next and I don’t want to know right now. I don’t want to say I’m defending the title because every year we start from scratch”, said Baez who looks to become the first ever two-time champion in Rio.

Baez, who claimed the biggest of his six ATP Tour titles last year, won the rematch against fellow countryman Mariano Navone this Wednesday.


Results - Wednesday, 19 February 2025
Men's Singles - Round of 16

F. Comesana (ARG) d [6] N. Jarry (CHI) 76(4) 67(1) 76(6)
[1] A. Zverev (GER) d A. Shevchenko (KAZ) 76(1) 76(6)
[Q] C. Tseng (TPE) d [WC] T. Monteiro (BRA) 67(4) 63 76(4)
[5] S. Baez (ARG) d M. Navone (ARG) 64 16 63

Men's Doubles - Round of 16

R. Matos (BRA)/M. Melo (BRA) d [4] A. Krajicek (USA)/R. Ram (USA) 57 76(5) 10-4
P. Martinez (ESP)/J. Munar (ESP) d R. Carballes Baena (ESP)/A. Muller (FRA) 63 64

Men's Doubles - Quarterfinal

[1] M. Gonzalez (ARG)/A. Molteni (ARG) d [WC] M. Demoliner (BRA)/F. Romboli (BRA) 75 76(0)
L. Darderi (ITA)/M. Navone (ARG) d [WC] O. Luz (BRA)/F. Meligeni Alves (BRA) 36 75 10-6