Roger Federer has added a gold medal to his extensive trophy collection by teaming with Stanislas Wawrinka to win the Olympic doubles yesterday, beating Simon Aspelin and Thomas Johansson of Sweden 6-3, 6-4, 6-7 (4), 6-3.

Federer extended his arms in triumph and began to hop. Then, he embraced his doubles partner and they hopped together. Federer had waited a while for a big victory to celebrate, and when the chance came he was ready.

For Federer, the victory was a moment to savour in a frustrating year. He lost in the quarterfinals of Olympic singles, his Grand Slam total has been stalled at 12 since last September, and his 4½-year reign atop the rankings will end Monday when Rafael Nadal becomes No. 1.

But he’s now a medalist for the first time in his three Olympics.

Earlier, Dinara Safina beat Li Na of China 7-6 (3), 7-5 to set up an all-Russian Olympic gold medal women’s singles final.

Safina closed out her victory less than five minutes after Elena Dementieva beat a third Russian semifinalist, Vera Zvonareva, 6-3, 7-6 (3).

The first tennis medal went to Novak Djokovic of Serbia, who won a bronze by beating James Blake of the United States 6-3, 7-6 (4) in men’s singles. A jubilant Djokovic ripped off his shirt and threw it to the cheering crowd, along with two rackets, and waved a Serbian flag as he jogged around the court.

“To win any medal in the Olympics is a huge achievement,” Djokovic said. “Not many of the athletes get a chance to win a medal.”

Mike and Bob Bryan of the United States won the bronze medal in doubles. The brothers rallied to defeat Michael Llodra and Arnaud Clement of France 3-6, 6-3, 6-4 Saturday.

Sisters Serena and Venus Williams advanced to today’s doubles final by beating another sibling pair, Ukraine’s Alona and Kateryna Bondarenko, 4-6, 6-4, 6-1.

Both were beaten in the quarterfinals of singles, but they’re assured of at least a silver medal in doubles.

“Obviously we would have loved to have brought home more medals for the U.S.,” Venus said. “We did the best we could. We’re not asking for more at this point. Next time we’ll ask for a little more.”

And there will be a next time, the sisters said. Both plan to play at the London Olympics in 2012.