The best pictures from the last 24 hours in sport

Jamaican sprinter Asafa Powell runs 9.72sec in the 100m at the IAAF Super Grand Prix in Lausanne on Tuesday, just 0.03sec outside Usian Bolt's new world record Photograph: Fabrice Coffrini/AFP

A referee fires a starting gun at the Lausanne meeting Photograph: Pascal Lavener/Reuters

Brazil's Maurren Higa Maggi competes in the women's long jump in Lausanne Photograph: Fabrice Coffrini/AFP

Russia's Andrey Silnov clears the bar in the men's high jump Photograph: Fabrice Coffrini/AFP

World No3 Novak Djokovic serves during his five-set win over Tommy Robredo in the US Open fourth round yesterday Photograph: Jim McIsaac/Getty

Roger Federer edges through 6-7, 7-6, 6-3, 3-6, 6-3 against Igor Andreev at the Arthur Ashe stadium on day nine of the US Open Photograph: Chris McGrath/Getty

Al-Arabi players celebrate after winning the Sheikh Jassem Cup final 3-0 against Al-Rayyan in Doha Photograph: Karim Jaafar/AFP

Usain Bolt heads to his fans after winning the 200m in Lausanne Photograph: Pascal Lauener/Reuters

Athletes test their tricycles in a tunnel at the Olympic National Stadium in Beijing - the Paralympic Games start on Saturday Photograph: Oded Balilty/AP