Olympic champion Andy Murray was sent crashing out of the Cincinnati Masters Tennis tournament in Ohio, going down to a shock 6-4, 6-4 defeat at the hands of French lucky loser Jeremy Chardy. Murray, the defending champion at this key US Open warm-up event, won just one match in Toronto last week before withdrawing with a knee injury.Four-time champion and top seed Roger Federer turned in another flawless performance to ease past Australian teenager Bernard Tomic, 6-2, 6-4, unleashing 27 winners. The 2009 US Open winner Juan Martin del Potro, who missed 2010 due to right wrist surgery, had troubles with his left wrist, requiring taping on his arm in his 7-6, 2-6, 6-1 defeat of Serb Viktor Troicki.