SOCHI, RUSSIA - MAY 19: A general view of construction site of Bolshoi Stadium in Olympic Park on May 19, 2013 in Sochi, Russia. Sochi is set to host 2014 Winter Olympic Games. PHOTOGRAPH BY ITAR-TASS / Barcroft Media

SINGAPORE - May 21: Radamel Falcao of Atletico Madrid yawns during a football clinic at Jalan Besar Stadium on May 21, 2013 in Singapore. Players from Atletico Madrid turned up at a football clinic with 128 boys from 13 Singapore primary schools. PHOTOGRAPH BY Xinhua /Landov / Barcroft Media

SWITZERLAND - MAY 20: The Grasshoper Club Players with the cup in pool in their cabin after winning the Swiss Cup 2013 final on May 20, 2013 in Switzerland. PHOTOGRAPH BY Imago / Barcroft Media

ROME, ITALY - MAY 19: Roger Federer of Switzerland in action against Rafael Nadal of Spain in their final match during day eight of the Internazionali BNL d'Italia 2013 at the Foro Italico Tennis Centre on May 19, 2013 in Rome, Italy. Nadal defeated Federer to win the title. PHOTOGRAPH BY Imago / Barcroft Media

HYDERABAD, INDIA - MAY 19: Dale Steyn of Sunrisers Hyderabad spotted taking picture during Indian Premier League, 72th match of Sunrisers Hyderabad and Kolkata Knight Riders at Rajiv Gandhi International Cricket Stadium on May 19, 2013 in Hyderabad, India. PHOTOGRAPH BY Mohammed Aleemuddin / Barcroft India

ROME, ITALY - MAY 19: Rafael Nadal of Spain with his winners trophy after his straight sets victory against Roger Federer of Switzerland in their final match during eight day of the Internazionali BNL d'Italia 2013 at the Foro Italico Tennis Centre on May 19, 2013 in Rome, Italy. PHOTOGRAPH BY Imago / Barcroft Media