But she was assured of that spot when Pliskova toppled Williams in the semi-finals .
Kerber , who beat Serena Williams in the final at Melbourne and lost to the US great in the Wimbledon final , will officially rise to world number one on Monday .
Kerber was assured of that spot when Pliskova toppled Serena Williams in the semi-finals .
Kerber , who beat Serena Williams in the final at Melbourne and lost to the US great in the Wimbledon final , will officially rise to world number one on Monday .