Roger Federer loses to Gael Monfils in third round of the Shanghai Masters . The former world No . 1 said he had been energized by the response to his first appearance since September 's U.S. Open after Wednesday 's win over Andreas Seppi , but he was stopped in his tracks 24 hours later . Former world No . 1 also beaten in the semifinals later Thursday . The former grand slam winner battling to qualify for ATP World Tour Finals . He missed out on a singles match against world No . 2 Novak Djokovic .
Roger Federer loses to Gael Monfils in third round of the Shanghai Masters . Former world No . 1 also beaten in the semifinals later Thursday . The former grand slam winner battling to qualify for ATP World Tour Finals . He missed out on a singles match against world No . 2 Novak Djokovic .