Slovakia's world number six Dominika Cibulkova dropped just two games in blistering heat to win her opening match at the Sydney International on Monday.

Serena and Venus Williams close in on a fifth all-sister Wimbledon final while beaten quarter-finalist Dominika Cibulkova prepares to rush back to Slovakia to get ready for her wedding.

Dominika Cibulkova could be forced to postpone her wedding after a shock Wimbledon win over world number three Agnieszka Radwanska, while Serena and Venus Williams march into the quarter-finals.