Coppa Italia holder Napoli trashed Genoa 6-0, with Chucky Lozano scoring a brace, but captain Lorenzo Insigne limped off with injury.
Rookie Yang Junxuan also claimed her second gold in the women's 200m freestyle in one minute and 56.52 seconds, Hou Yujie from Henan ranked first in the men's 100m freestyle, and Hebei's Zhang Ke touched the finishing line first in the women's 800m freestyle.
In the constructors' standings, Mercedes remains well out in front with 366 points, ahead of Red Bull on 192 points and McLaren on 106.
There was controversy before the race had even started, as it emerged that Hamilton was under investigation for making two practise starts outside the permitted area of the pit lane on his way to the starting grid.
The swimmers' performances at the championships will act as an important reference for their qualification for next year's Tokyo Olympic Games. Enditem
Yan established an advantage from the very beginning, leading runner-up Yu Zongda, also from Hubei, by nearly two seconds in the first 50 meters. Huang Chaosheng from Hunan finished third.
Vinicius Paiva put the hosts ahead by tapping home just after halftime before Lucas Evangelista equalized with a long-range effort.
ITTF's major reforms took place at Monday's AGM with the establishment of an ITTF Tribunal and an ITTF Integrity Unit, seen as an important step towards improving the organization's governance.
Kenyan Peres Chepchirchir, the current half marathon record holder and Fancy Chemutai will also be in the frontline.
Comments of team leaders indicate growing unrest in a squad that seems to fear their ambitions could be disappointed when trying to repeat some of last season's success after winning the treble.
Stage two containing eight groups will be held from October 26 to 29. Stage Three with two groups is scheduled to play on October 30 and the final is on October 30. Enditem