SAN FRANCISCO, July 19 (Xinhua) -- Following is the schedule for opening rounds of 2018 Rugby World Cup Sevens, which kicks off at AT&T Park here on Friday:

Men's tournament:

Preliminary round

Kenya v Tonga

Canada v Papua New Guinea

France v Jamaica

Wales v Zimbabwe

Samoa v Uganda

Russia v Hong Kong, China

Japan v Uruguay

Ireland v Chile

First round

Scotland v Kenya or Tonga

Argentina v Canada/PNG

Australia v France/Jamaica

England v Samoa/Uganda

New Zealand v Russia/Hong Kong, China

Fiji v Japan/Uruguay

South Africa v Ireland/Chile

United States v Wales/Zimbabwe

Women's tournament

First round

Fiji v Spain

France v Japan

Russia v South Africa

Canada v Brazil

Australia v Papua New Guinea

New Zealand v Mexico

England v Ireland

United States v China

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