Defending champion Viktor Axelsen will play with a "fresh body" in the Olympic badminton quarterfinals after dismantling Ireland's Nhat Nguyen to cruise into the knockout round Wednesday.
Denmark's Axelsen made it three wins from three in Paris, overcoming a slow start to beat Nguyen 21-13, 21-10 and top his first-round group.
Axelsen, who would have been eliminated if he had lost, said he "stepped up and managed to play at a pretty consistent high level".
"Nhat couldn't really find the answers in the last part of the game," said the world No 2, who lost the top ranking to China's Shi Yuqi in June.
"All in all, very positive and I go into the quarters with a fresh body. I'm very, very happy with my performance."
Shi joined him with a 21-9, 21-10 stroll past Italy's Giovanni Toti.
Both Shi and Axelsen skip the last 16 and jump straight into the quarterfinals because of their world rankings.
Shi, who has won four tournaments on badminton's world tour this year, said he was not feeling any extra pressure as the top-ranked player in the tournament.
"I haven't thought about it much," said Shi, who is eyeing a first Olympic medal.
No 3 seed Jonatan Christie of Indonesia was eliminated after losing his final group match to India's Lakshya Sen.
Sen came through a tightly fought contest 21-18, 21-12 and said he was "really pumped up to fight in every match and every point".
"The last few months the form has been really good," said Sen.
"I've had ups and downs but overall I've been in good shape."
Thailand's No 8 seed Kunlavut Vitidsarn went through when his Finnish opponent Kalle Koljonen retired from the match.
In women's singles, Japan's No 5 seed Akane Yamaguchi advanced after beating Canada's Michelle Li 22-24, 21-17, 21-12.
India's PV Sindhu also went through with a 21-5, 21-10 win over Estonia's Kristin Kuuba.