Scott Evans of Ireland was made to wait eight years for his first win on badminton's biggest stage but only 24 hours for his second – and never in his career can he have made himself more unpopular.

In a white-hot atmosphere inside Riocentro Pavilion 4 on Saturday evening (13 August), the 28-year-old Dubliner held off a spirited challenge from Ygor Coelho de Oliveira to upset a home-town crowd which included a noisy contingent from the Brazilian's local badminton club only 15km up the road.

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"Today was one of the most difficult matches of my life, I think. He's a good player and the crowd has been absolutely crazy," said Evans, who lost both of his matches at the Beijing 2008 and London 2012 Olympic Games and heard his every point booed against de Oliveira.

"I'm just happy that I was able to play with a crowd like this and be able to deal with it. It was a real honour for me to play here tonight," Evans said.

De Oliveira had fought back from a game down to level the match at 1-1 before losing his concentration as Evans opened up an unbridgeable gap in the third.

In the morning session, Russians Ivan Sozonov and Vladimir Ivanov outplayed Republic of Korea's world No.1 pair, Lee Young Dae and Yoo Yeon Seong to cement their status as medal contenders in the men's doubles.

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In the mixed doubles event, Chris Adcock and wife Gabrielle Adcock of Great Britain disintegrated in their deciding game against Robert Mateusiak and Nadiezda Zieba of Poland, but the biggest casualties of group B were London 2012 bronze medallists Christinna Pedersen and Joachim Fischer Nielsen. The Danes, ranked No.4 in the world, crashed out of the competition after losing in three games to unseeded Chinese pair, Xu Chen and Ma Jin.

"I think Xu Chen played very well today. I saw him play yesterday and he looked like an old man, but he wasn't old today," the 37-year-old Fischer Nielsen said.

Pedersen dismissed a post-match hint from her partner that one of badminton's most celebrated double acts was about to end.

"He won't stop. This was not our last match I can tell you for sure," said Pedersen, who returned in the afternoon to win her women's doubles match alongside Kamilla Rytter Juhl. "I won't play without him so we have already had that conversation."

There was double disappointment for the Danes after London 2012 silver medallists in the men’s doubles, Mathias Boe and Carsten Mogensen, failed to make it out of group C.

The mixed doubles quarterfinals take place on Sunday, as well as the concluding matches in the group stages of the singles events.

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