Angelique Kerber was within one win of supplanting Serena Williams as the world No 1 in Cincinnati last week .
Angelique Kerber blew her chance with a comprehensive loss to Karolina Pliskova in the final .
Angelique Kerber was within one win of supplanting Serena Williams as the world No 1 in Cincinnati last week , but blew her chance with a comprehensive loss to Karolina Pliskova in the final .