So semifinals consist of the following teams from this year's series
Aus 4th
Fra 5th
Fij 6th
RSA 7th
with 1 Arg, 2 IRE, and 3 NZL all losing in the quarters. The other quarter-finalist was the 9th placed USA.
Going back to the most recent tournament from Madrid you have left
1 FRA
3 FIJ
6 RSA
7 AUS
The only teams remaining to have won a tournament this year are France, with 2 wins, a 2nd and a 3rd, and RSA, who won the the first and then were terrible for the rest of the season. Fiji's best result this year was third place (twice) with Australia's being two 2nd places.
RSA are probably the surprise team to still be there as they only just qualified in the final qualification tournament after Kenya knocked them off in the African qualification tournament.