David Young attached Connect the bomb trigger to his wrist and threatened Warning the group that he might , at any time , move Self_motion his arm and ignite Process_start the bomb .

Before leaving Departing the room , David Young attached Connect the bomb 's detonation device to his wife 's wrist .

Rafael Nadal was the defending Defending champion in the men 's event ; however , on 18 August , the Spaniard announced Expressing_publicly his withdrawal Removing from the event after failing Earnings_and_losses to recover Recovering from a wrist injury Bodily_harm , while Serena Williams was the two-time defending Defending champion in the women 's event .