The week in sport – in pictures

Triathletes exit the water during the Ironman 70.3 Triathlon in Singapore Photograph: Tim Chong/Reuters

Fernando Alonso zooms past during practice for the Australian Grand Prix Photograph: Clive Mason/Getty Images

Italy's Martin Castrogiovanni sings before their Six Nations match against Scotland. Italy won 13-6 Photograph: Lynne Cameron/PA

Mike Hussey of Australia dives to save his wicket during an ODI against West Indies Photograph: Jewel Samad/AFP/Getty Images

The women's 100m backstroke final during day three of the Australian Swimming Championships Photograph: Quinn Rooney/Getty Images

A peloton of cyclists travels along the Pacific Coast Highway in southern California Photograph: Joe Klamar/AFP/Getty Images

Tonia Couch and Sarah Barrow of Britain compete in the women's synchro 10m platform during the Diving World Series final in Dubai Photograph: Karim Sahib/AFP/Getty Images

Berlin (right) battles with Hovex Lass at the Brighton and Hove Greyhound Stadium Photograph: Mike Hewitt/Getty Images

Bodybuilders pose during the Australian Pro Grand Prix XII in Melbourne Photograph: Robert Cianflone/Getty Images

Corinthians fans show their support during a Copa Libertadores match aginst Mexico's Cruz Azul Photograph: Yasuyoshi Chiba/AFP/Getty Images

Tiger Woods digs up the turf during a preview for the 2012 Arnold Palmer Invitational in Orlando, Florida Photograph: David Cannon/Getty Images

Laure Manaudou competes in the 50m backstroke during the French Swimming Championships Photograph: Philippe Huguen/AFP/Getty Images

US gymnast Gabrielle Douglas in action during her gold medal-winning performance on the uneven bars at the Pacific Rim Gymnastics Championships Photograph: Ted S. Warren/AP

Napoli's Edinson Cavani celebrates after scoring against Siena in the semi-finals of the Italian Cup Photograph: Roberto Salomone/AFP/Getty Images