SINGAPORE - The New Zealand, Fiji, England and Scotland rugby sevens teams will have to wait a few more hours before stepping onto Singapore soil, ahead of the Singapore leg of the HSBC Sevens World Series on April 16-17.

The teams were originally slated to arrive in Singapore at 7.10pm on Monday evening, but a medical emergency to one of the passengers on board forced air crew to turn back to Hong Kong.

A new flight carrying the four teams is expected to touch down at 11.10pm.

While fans will have to wait a little longer to see the likes of All-Black Sonny Bill Williams, most of the other 12 teams have already arrived in the Republic.

An estimated 60 boys from the Spartans Rugby Club, along with their parents, had their rugby balls and apparel signed by players from teams United States, Australia, Wales and South Africa at the Pan Pacific Hotel, where they will stay for the week.

The former three arrived in Singapore at 6.20pm, while the Blitzboks landed later at 7.35pm.

Canada, Argentina, France, Kenya, Russia and Samoa landed earlier in the day. Portugal is slated to arrive past midnight.