Yoandy Leal Hidalgo was the key man for Brazil as he racked up 20 points in a dominant display to down the Iranian team at the Gliwice Arena in the Polish city.

Brazil took the first set in impressive fashion before holding off Iran in the second and third to complete a 25-17, 25-22, 25-23 triumph.

The three-time Olympic and world champions will be determined to clinch a fourth title after finishing runners-up to Poland in 2014 and 2018.

Argentina will aim to stop Brazil in their tracks after seeing off Serbia 25-23, 25-21, 25-23 in Gliwice to set up an all-South American quarter-final.

It was Serbia’s first defeat of the tournament as Argentina came from behind in the opening two sets to secure a superb victory.

Agustín Loser played a staring role with a fine performance at the net, with three block points in a 12-point haul.

Bruno Lima top scored with 14 points, while Facundo Conte contributed with 13 including two blocks.

"We played really well," said Argentinian captain Luciano de Cecco.

"Serbia are really tough but we played good volleyball against an amazing team so we are proud of the way we fought and of the result.

"It’s amazing."

Competition is due to continue tomorrow with the first two quarter-finals as Olympic champions France take on Italy and co-hosts Slovenia meet Ukraine.