Brit Ed Jefferies marched into the quarter-finals with a hard-fought 15-12 victory over American Chamley-Watson. He will face Korea's Seung Woong Lee who defeated Robert Gatai 15-11.
Top seed Lari (ITA) beat compatriot Giorgio Avola 15-12 and Lari's next opponent will be Jialuo Shi (CHN) who beat Daniel Gomez of Mexico 14-13 in extra time.
Alessio Foconi (ITA) strolled past Canadian Anthony Prymack 15-4 and will face Marius Braun (GER) who eliminated Moon of Korea 15-10.
Completing the quarter-finals are Paul Fausser (FRA) who beat Volodymyr Koltygo(UKR) 15-10 and Gerek Meinhardt (USA) winner over no. 2 seed Helissey of France.