16 are left -- 11 with one loss and 5 undefeated. They all play about 8 hours from now in Round 9 .
Efren is one of the 5 undefeated, so he will make it to Round 10 even if he loses (against Daulton) in Round 9. Round 10 will have at least 9 players and at most 12.
Edit -- And I suppose it's possible there is a 17th player, one who got a bye for Round 9.