Fourth seed Caroline Wozniacki, another woman to have occupied top spot in the world rankings, breezed through her opening match, beating Czech world No. 59 Barbora Zahlavova Strycova 6-4 6-0.

CNN: Serena returns with victory in Miami

Ivanovic, who occupied top spot after winning the French Open in 2008 but is now ranked 16th, recorded a 6-3 6-2 against the Danish fourth seed -- who lost her No. 1 ranking following Victoria Azarenka's triumph at January's Australian Open.

CNN: STORY HIGHLIGHTS

Coastal hotspots such as Mombasa, Malindi and Lamu occupied the second spot in The Wealth Report 2012, recording a 20% price growth in luxury residential properties.

CNN: Lavish and sleek: Kenya's prime property market boom