Reigning World Series champions Samoa and tournament hosts South Africa have both been forced to make changes ahead of the second leg of the 2010/11 HSBC Sevens World Series in George, South Africa.
All 16 teams have declared their final squads for the tournament, which will take place at the Outeniqua Park Stadium in George on 10-11 December.
Dubai champions England are one of the eight squads that are unchanged from Dubai - Argentina, Australia, Fiji, New Zealand, Portugal, Scotland and Zimbabwe are the others - as the sides gear up for another weekend of action.
Samoa coach Stephen Betham lost experienced captain Lolo Lui and seasoned playmaker Reupena Levasa to injury in Dubai last weekend and has drafted in the experienced Alatasi Tupou and Sani Niue, who is set to play his first World Series event.
"I thought we did well in Dubai. It's disappointing to lose in a final but it's a learning curve and we still have lots to learn. There are still seven tournaments to go and we've got to grab as many points as we can before the end of the year," said Betham, whose side faces an intriguing pool tie against Fiji, whom they beat in the Dubai semi finals.
"The island rivalry is always there, it's like older brother against younger brother, there's no love lost and it's always physical. It won't be any different this weekend, but the boys are used to playing hard games week-in and week-out and that's what it's all about, putting in a consistent performance every time you step out onto the field."
South Africa Sevens coach Paul Treu will give a World Series debut to Jacques Engelbrecht, who replaces Lubabalo Mtembu. Experienced half back Paul Delport also comes into the side as a replacement for Renfred Dazel, who is still recovering from a blow to the head, and Steven Hunt takes the place of MJ Mentz.
Neighbouring Namibia arrive in George to play their first event of the new HSBC Sevens World Series, having replaced Arabian Gulf from the Dubai draw, the only change from last weekend. The Namibians name no less than nine players new to the World Series - Melrick Africa and Deon Mouton their most experienced players with seven caps under their belt.
France, Kenya, USA and Wales each make one change. France have flown in Zambelli Thibaut for his World Series debut as a replacement for Steve Barry; Innocent Simiyu will play his 31st World Series tournament for Kenya in place of Peter Ocholla; P J Komongnan comes in for Jason Pye in the USA squad and Wales coach Paul John has drafted in Will Jones in place of Owen Williams.
Russia name three changes - Eduard Filatov and Kirill Gubin both taking their first bows at this level and replacing Nikolay Shugay and Alexey Shcherban. Ivan Kotov also comes in for his fourth event, replacing Sergey Trishin.
MEDIA: RIGHTS-FREE AUDIO, COMMENTARY NOTES AND STATISTICS ARE AVAILABLE FOR THE SOUTH AFRICA EVENT! CLICK HERE >>
Video: England win Dubai - Extended highlights
RWC 2019 Tickets
RWC 2019 Official Ticketing site NOW LIVE
Fans can now register interest to apply for Rugby World Cup 2019 tickets