Roger Federer had never lost his opening match at the ATP World Tour Finals since the elite tournament moved to London in 2009. That's all changed now.

On the back of a chaotic and disappointing season, the former World No. 1 tasted defeat for the second time in less than a week against defending champion Novak Djokovic 6-4, 6-7 (2), 6-2 on Tuesday.

Title holder Bayern Munich won 1-0 at Viktoria Plzen on Tuesday to advance to the knockout stage of the Champions League, while group rival Manchester City reached the second round for the first time by outclassing CSKA Moscow 5-2.

Paris Saint-Germain and Real Madrid missed early opportunities to qualify by being held to draws — and both had to come from behind. PSG was held 1-1 at home by Anderlecht and Real settled for a 2-2 draw at Juventus.

Researchers studying the effects of climate change on polar bears are experimenting with the idea of crowdsourcing data as improving technology allows anybody with an Internet connection to monitor the animals' annual migration in Canada.

Polar bears gather at this time of year on the Hudson Bay's southwestern shore to wait for the water to freeze so they can wander the ice and hunt for seals. The migration to the Wapusk National Park in Manitoba is far enough south to make the Western Hudson Bay polar bears one of the most accessible and studied populations of the species.

Nguyen Thi Yen rolls up the sleeves of her white lab coat and delicately slips her arms into a box covered by a sheath of mesh netting. Immediately, the feeding frenzy begins.

Hundreds of mosquitoes light on her thin forearms and swarm her manicured fingers. They spit, bite and suck until becoming drunk with blood, their bulging bellies glowing red. Yen laughs in delight while her so-called "pets" enjoy their lunch and prepare to mate.

Tom Cruise maintains a close relationship with his daughter Suri despite his divorce from her mother and a hectic film schedule, the actor wrote in a court filing to support his defamation lawsuit against a magazine publisher.

The actor's two-page description of his relationship with his daughter was filed Tuesday in a case against Bauer Publishing Co. The actor is suing Bauer over a pair of 2012 tabloid stories that claimed he had "abandoned" his daughter. The stories in Life & Style and In Touch magazines cited Cruise's absence from Suri's life due to overseas film shoots.

Evelina Gonzalez was supposed to undergo cancer surgery in July following chemotherapy but wound up shuttling from hospital to hospital in search of an available operating table. On the crest of her left breast, a mocha-colored tumor doubled in size and now bulges through her white spandex tank top.

Gonzalez is on a list of 31 breast cancer patients waiting to have tumors removed at one of Venezuela's biggest medical facilities, Maracay's Central Hospital. But like legions of the sick across the country, she's been neglected by a health care system doctors say is collapsing after years of deterioration.

Songwriter Dean Dillon penned hits for George Strait, George Jones, Kenny Chesney and other country music stars in his prolific career in Nashville and several of those artists honored him as the newest BMI Icon at Tuesday's BMI Country Awards.

Dillon has written more than 50 songs for Strait. The beloved singer paid homage with a medley of his Dillon-penned hits, including "The Chair," ''Marina Del Ray," and "Here For A Good Time." Chesney, Luke Bryan and Lee Ann Womack also performed some of Dillon's songs at the annual event put on by Broadcast Music, Inc., a music rights management company.

Just a few blocks from the White House where Myanmar's president was feted for working for democracy, another side of his country is now on display at a more haunting Washington landmark: the plight of its most beleaguered people, the Rohingya Muslims, depicted in photos projected at night onto the external walls of the Holocaust Memorial Museum.

The stark, black and white images by American photographer Greg Constantine combine searching portraits with pictures of the scorched settlements the Rohingya were forced to flee after a deadly outbreak of sectarian violence last summer that left more than 100,000 confined to camps and further darkened the prospects for this stateless people. They are denied citizenship in Myanmar, also known as Burma, and are typically regarded there as illegal immigrants from neighboring Bangladesh.

Top-ranked Rafael Nadal breezed past fellow Spaniard David Ferrer 6-3, 6-2 to win his first round-robin match at the ATP World Tour Finals on Tuesday.

After trading breaks in the opening set, Nadal became untouchable on serve, dictating the play from the baseline and forcing Ferrer into many errors.

FIFA announced that nearly 900,000 tickets have been allocated to fans from 188 countries in the random selection draw for the 2014 World Cup, the highest number ever in the first phase of sales.

Football's governing body said on Tuesday that Brazilians received 625,276 of the 889,305 available tickets. American residents were awarded 66,646 tickets, while the English followed with 22,257 and the Germans with 18,019.