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					Originally posted by RatedG²  ... | 
	
 realized a made a "slight" miscalculation with Halep's rankings points but all scenarios are true for Petra to go to number one 

. Moving on...
Kinda piggybacking off of this post let me see what it takes for 
Simona Halep to get the number 1 ranking
Points + Ranking right now
(1) Serena: 9430 pts
(2) Halep: 6750 pts
Points 
without the US Open on 
and after New Haven
Serena: 7430 pts
Halep:  6310 pts
If Halep
 defeats Serena in the finals the points would be
Serena: 8830 pts
Halep: 8310 pts
If Halep 
wins and Serena 
loses in the semis
Serena: 8330 pts
Halep: 8310 pts
So one of Halep's conditions is for Serena NOT to reach the semis. Another is for Kvitova not to win the US Open.
Let me find out if Halep does one round better (or equal)
If Halep 
loses in semifinals and Serena 
loses in first round
Serena: 7435 pts
Halep: 7710 pts
If Halep 
loses in the semifinals and Serena 
loses in fourth  round
Serena: 7710 pts
Halep: 7710 pts
So this is interesting
For Simona Halep to become number 1
1) Serena must not reach the Quarters or better
2) Petra Kvitova must not win the tournament
3) Has to make the semifinals or better
If Halep loses in the semis and Serena loses in the fourth, they'd become co-world number 1s. It will probably be for a week or two and would end most likely in Tokyo (or Beijing, whichever comes first)