We're (maybe) number 1!

There are five WTA players who, by the end of play in Cincinnati this week, could be ranked number 1 in the world. Here's the breakdown:

World number 1 Karolina Pliskova can retain her ranking if:

• she wins the title
• she reaches the semifinals and Simona Halep does not win the title
• she reaches the quarterfinals, Halep does not reach the final, or Elina Svitolina does not win the title
• she reaches the third round, Halep does not reach the semifinals or Svitolina does not win the title

World number 2 Simona Halep can become number 1 if:

• she wins the title
• she reaches the final and Pliskova does not reach the semifinals
• she reaches the semifinals, Pliskova does not reach the semifinals, and Svitolina does not win the title

 World number 4 Elina Svitolina can become number 1 if:

• she wins the title and Pliskova does not reach the semifinal
• she reaches the final, Pliskova loses her first match, and Halep does not reach the semifinals

World number 3 Angelique Kerber can regain the number 1 ranking if:

• she wins the title, Pliskova loses her first match, and Halep does not reach the semifinals

World number 5 Caroline Wozniacki can regain the number 1 ranking if:

• she wins the title, Pliskova loses her first match, and Halep does not reach the semifinals

And if you think that's confusing, consider it handy practice for when the Singapore round robin process rolls around.