Rio 2016 silver medallist Daniel Perez of the Netherlands will face Russian world number four Mikhail Gutnik in the quarter-finals of the BC1 event at the Boccia International Sports Federation World Open in Montreal.
Perez won three of his four matches in Pool A to progress to the last eight of the event at Maurice-Richard Arena.
The only blemish on his record was a 7-0 defeat at the hands of Portugal's Andre Ramos.
Gutnik, ranked a place below Perez on the world standings, reached the quarter-finals with a 100 per cent record.
The Russian beat Canadian Lance Cryderman 6-1 before thrashing American Brigid Mason 11-3.
He later overcame Bermuda's Omar Hayward 13-0 and finished his pool stage campaign with an 8-1 win over Portugal's António Marques 8-1.
In the BC2 category, Brazil's Maciel Santos, ranked third in the world, was among the players to secure a place in the quarter-finals.
Santos topped Pool A with a perfect record as he won all three of his games.
The Brazilian will take on Israel's Nadav Levi for a spot in the semi-finals.
Colombia's Euclides Grisales, one of the favourites in the BC4 category, suffered a shock exit at the first hurdle.
Grisales was beaten 5-1 by South Korean Jang Seong-yuk, who will play veteran Canadian Paralympic bronze medallist Marco Dispaltro in the last eight.