By Zjan Shirinian

Wales tried and tried, but Fiji ultimately won their encounter 42-7 ©Getty ImagesMarch 28 - The top seeds have made light work of their opponents on the opening day of the HSBC Hong Kong Sevens.

Tunisia made Hong Kong work a little harder than expected, before the hosts secured a 19-7 win.

Their second game, against American Samoa, was won by a comfortable 38-7.

Fiji trounced Wales 42-7, while New Zealand crushed Scotland 33-0.

England edged Argentina 19-12, while Japan kept two clean sheets with an impressive 24-0 win over Uruguay and a 41-0 victory over Trinidad and Tobago.

The final pool games and quarter-finals for round seven of the HSBC Sevens World Series are due to be played tomorrow.

Sunday (March 30) will see the semi-finals and finals played.

Japan trounced Uruguay and Trinidad and Tobago, keeping clean sheets in both matches ©Getty ImagesJapan trounced Uruguay and Trinidad and Tobago, keeping clean sheets in both matches ©Getty Images

In front of a sell-out crowd, all 28 teams playing wore tee-shirts for Keep Rugby Clean Day, supporting the International Rugby Board's (IRB) ducation campaign around drug-free rugby and the dangers of doping.

South Africa sevens star Cecil Afrika said: "I am extremely proud to be one of the IRB's anti-doping ambassadors, and I can say with confidence that all the players here in Hong Kong have worn their 'Keep Rugby Clean' T-shirts with pride.

"Rugby is one of the leading sports in terms of its anti-doping programme and education and we all feel very strongly about this.

"It is important that we play on a level playing field and ensure the integrity of our game."

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