Top seed Serena Williams was knocked out of the ASB Classic in Auckland in the second round by fellow American Madison Brengle today.

Serena Williams was happy with her start to the Sony Ericsson Open in Key Biscayne, Miami, as she dropped just five games to Chinese opponent Zhang Shuai.

Last year’s Wimbledon runner-up Vera Zvonareva survived a first-round scare to defeat promising young American Alison Riske 6-0 3-6 6-3 this afternoon.

Serena Williams will regain her world number one ranking after she beat Russia’s Ekaterina Makarova 6-3 6-2 in the second round of the China Open.

Beijing Hyundai 0 Manchester United 3