World number one Serena Williams has eased into the semi-finals of the Australian Open. The top seeded American beat fifth seed Maria Sharapova in straight sets, winning 6-4, 6-1. Sharapova has now lost 18 times in a row against Williams. The victory sets up a last-four meeting with fourth seed Agnieszka Radwanska, who beat Carla Suarez Navarro 6-1, 6-3.

Italian jockey Dettori injured in Newmarket car accident
US keep World Cup dream alive with gutsy win over Bosnia
Belgium stage stunning comeback to sink Senegal in extra time
Kane double rescues England in comeback win over DR Congo
Gauff survives Wimbledon scare, Krejcikova rallies past Andreeva
