In 2011, according to the U.S. Bureau of Labor Statistics, there were 2.3 incidents of injury and illness per 100 oil and gas workers.

FORBES: Oil & Gas Isn't Just One Of The Richest Industries, It's Also One Of The Safest

Tsonga was playing only his fifth match since losing to Murray in the Wimbledon quarter-finals because of injury and he had the misfortune to run out of gas just as Murray appears to be rediscovering his confidence.

BBC: Andy Murray beats Jo-Wilfried Tsonga in Shanghai