China's Lin Dan dives for a return while playing against Sho Sasaki in a men's singles badminton quarterfinal match at the 2012 Summer Olympics. Photo: PTI

South Africa's Alviro Petersen (right) celebrates his century watched by AB de Villiers during the first day of the second cricket Test match at Headingley, Leeds, England. Photo: PTI

In this image released by DigicelCricket.com, New Zealand's captain Ross Taylor plays a shot off West Indies' bowler Darren Sammy during the opening day of their second cricket Test match in Kingston. Photo: PTI

Maria Sharapova of Russia waves to the crowd after defeating Kim Clijsters of Belgium at the All England Lawn Tennis Club in Wimbledon, London at the 2012 Summer Olympics. Photo: PTI

U.S. gymnast Gabrielle Douglas acknowledges the audience after being declared winner of the gold medal during the artistic gymnastics women's individual all-around competition at the 2012 Summer Olympics. Photo :PTI

South Korea's Lee Hyun-il celebrates after a win over China's Chen Jin, unseen, at a men's singles badminton quarterfinal match of the 2012 Summer Olympics. Photo: PTI

Roger Federer of Switzerland applauds the crowd after defeating John Isner of the United States at the All England Lawn Tennis Club in Wimbledon, London at the 2012 Summer Olympics. Photo: PTI

President Barack Obama, holds up five-month-old Kaydence Moore at a campaign rally at Rollins College in Orlando, Fla. Photo: PTI

United States' Michael Phelps, right, looks to silver medalist Ryan Lochte of the United States after winning gold in the men's 200-meter individual medley swimming final at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics in London. Photo: PTI

Italy's Arianna Errigo, Ilaria Salvatori, Elisa Di Francisca and Valentina Vezzali react after defeating Russia in the gold medal match at women's team foil fencing at the 2012 Summer Olympics. Photo: PTI

Pakistani ship officer Raheel Anwar meets his mother upon arrival at Karachi airport in Pakistan. The seven Pakistani crew members aboard MV Albedo, who were hijacked by Somali pirates in November 2010, returned home safely, official said. Photo: PTI

Pakistani ship officer Mohammad Mujtaba meets his children upon arrival at Karachi airport in Pakistan. The seven Pakistani crew members aboard MV Albedo, who were hijacked by Somali pirates in November 2010, returned home safely, official said. Photo: PTI

Real Madrid's Cristiano Ronaldo, right, falls over Los Angeles Galaxy's Tommy Meyer during the second half of an exhibition soccer match in Carson, Calif. Real Madrid won 5-1. Photo: PTI

West Bengal Chief Minister Mamata Banerjee tying Rakhi on the wrists of school Children to celebrate 'Raksha Bandhan' at State Secretariat building in Kolkata. Photo: PTI

A mynah bird feeds its young ones in New Delhi on Friday. Photo: PTI

India's Vijender Singh is declared winner against Terrell Gausha of USA in the men's middleweight (75kg) category boxing at Olympic Games 2012 in London. Photo: PTI

Navy Chief Admiral Nirmal Verma shakes hands with Commander-in-Chief of Defence Services of Myanmar, General Min Aung Hlaing before presentation of guard of honour to the latter at South block in New Delhi. Photo: PTI

FICCI Sr Vice Presidents Naina Lal Kidwai, Deputy Prime Minister & Minister for Foreign Affairs, Foreign Trade and European Affairs of Belgium Didier Reynders and Ambassador, European Union Delegation to India, Joao Cravinho during an interactive session in New Delhi. Photo: PTI

From left, China's Tang Yi, Netherlands' Ranomi Kromowidjojo and Belarus' Aliaksandra Herasimenia pose with their medals for the women's 100-meter freestyle swimming final at the Aquatics Centre in the Olympic Park during the 2012 Summer Olympics in London, Kromowidjojo won gold, Herasimenia silver and Tang bronze. Photo: PTI