Sport: 24 hours in pictures

Competitors dive at the start of the women's 50m butterfly at the Australian Swimming Championships in Sydney. Swimmers will experience the post-polyurethane blues, with the sleek full-length suits worn by most elite swimmers in the last two years now banned Photograph: Rick Rycroft/AP Photograph: Rick Rycroft/guardian.co.uk A Boston Celtics fan gets into the spirit of things for his team's St Patrick's Day game against the New York Knicks Photograph: Brian Snyder/Reuters Photograph: Brian Snyder/guardian.co.uk New Jersey Devils' Dainius Zubrus shoots under the dive of Pittsburgh Penguins goalie Brent Johnson Photograph: Mike Segar/Reuters Photograph: Mike Segar/guardian.co.uk Universidad de Chile fans light flares during a Copa Libertadores match against Brazil's Flamengo in Santiago Photograph: Roberto Candia/AP Photograph: Roberto Candia/guardian.co.uk Gregor Schlierenzauer of Austria soars through the sky to qualify for the Ski Flying World Championships in Planica Photograph: Hrvoje Polan/AFP/Getty Images Photograph: Hrvoje Polan/guardian.co.uk The Cottesloe crew nose dives during the Masters competition at the Australian Surf Life Saving Championships at Kurrawa Beach on the Gold Coast Photograph: Dave Hunt/EPA Photograph: Dave Hunt/guardian.co.uk Rafael Nadal of Spain competes with John Isner of the US during the BNP Paribas Open in California. Nadal won 7-5, 3-6, 6-3 Photograph: Gabriel Bouys/AFP/Getty Images Photograph: Gabriel Bouys/guardian.co.uk France's Jo-Wilfried Tsonga struggles to hold back Sweden's Robin Soderling and is beaten in straight sets Photograph: Chris Carlson/AP Photograph: Chris Carlson/guardian.co.uk At the Vancouver Winter Paralympic Games, Cho Young-jae of Korea makes a sly pass under his legs against Sweden during an ice sledge hockey classifications game Photograph: Martin Rose/Bongarts/Getty Images Photograph: Martin Rose/guardian.co.uk Mark Arendz of Canada kneels for the rifle stage of the 12.5km standing biathlon Photograph: Hannah Johnston/Getty Images Photograph: Hannah Johnston/guardian.co.uk Laurent Caul-Futy of France leans into a bend during the giant slalom Photograph: Jonathan Hayward/AP Photograph: Jonathan Hayward/guardian.co.uk The England squad share a joke during a practice session ahead of the second Test against Bangladesh Photograph: Aijaz Rahi/AP Photograph: Aijaz Rahi/guardian.co.uk Houston Rockets' Jordan Hill dunks against the Memphis Grizzlies. Houston won 107-94 Photograph: David J Phillip/Associated Press Photograph: David J. Phillip/guardian.co.uk Hot air balloons float over the Putra Mosque during the second International Hot Air Balloon Fiesta in Malaysia Photograph: Ahmad Yusni/EPA Photograph: Ahmad Yusni/guardian.co.uk