Roger Federer and Stan Wawrinka will lead a star-studded Swiss tennis team gunning for gold at the Rio Olympics in August, officials said Thursday. World No. 3 Federer, who will turn 35 during the Games, will be playing in his fifth — and surely last — Olympics and will be hoping to sign off with a gold medal to add to his already bulging trophy cabinet. He and Wawrinka, No. 5 in the world, are among six Swiss players named by the country's Olympic committee for the Aug. 5-21 Games. Martina Hingis, the 35-year-old former women's No. 1, will also take part, along with eighth-ranked Belinda Bencic and Timea Bacsinszky. Xenia Knoll is also lined up to take part. Federer and Wawrinka won gold in the doubles in Beijing in 2008, and Federer took silver in the singles four years ago, losing to Andy Murray in the final in London. Nadal, Muguruza in Spain squad Rafael Nadal and Garbine Muguruza will lead Spain's charge for Olympic tennis glory at Rio in August and could play together in the mixed doubles, officials said Thursday. Also in a strong Spanish team are David Ferrer, ranked 14 in the world, Albert Ramos and Roberto Bautista Agut, Spanish tennis authorities said. The women will be spearheaded by Muguruza, fresh from her French Open title.