Opening victory

Federer advances at ATP Finals

LONDON — One break of serve, and a mini-break, was all Roger Federer needed to win his opening match at the season-ending ATP Finals on Sunday.

The 19-time Grand Slam champion broke Jack Sock at the start of his 6-4, 7-6 (4) victory at the O2 Arena. Both then held serve the rest of the way, with Federer losing only three points on his serve in the second set.

"Sure, I had a tactical plan with my team," Federer said. "But very often in a first match like this, it gets thrown overboard because at the end you're just happy to be serving well. Focus on that first, and then on the return game sort of try your best, try to keep the ball in play, and go from there."

The 36-year-old Federer, who is ranked No. 2 in the world and won the Australian Open and Wimbledon this season, is the oldest player ever to qualify for the seasonending tournament, which started in 1970.

In the late match, Alexander Zverev beat Wimbledon runner-up Marin Cilic 6-4, 3-6, 6-4. AP

AP TRIUMPH. Roger Federer of Switzerland celebrates at match point after beating Jack Sock of the United States in their singles tennis match at the ATP World Finals at the O2 Arena in London, Sunday, November 12.