The Bay Area has showcased many of sports’ biggest stars, but there’s one legend who has eluded us. Until now. Roger Federer will play his first match in the Bay Area on March 5 at San Jose’s SAP Center. The event, titled “Match for Africa 5 Silicon Valley,” is a fundraiser for the Roger Federer Foundation, which provides access to education for children in South African countries. It’s a chance for fans to see perhaps the greatest tennis player in history, in a relaxed environment, raising money for a good cause. “We want to go places where people really enjoy tennis, and where it might sell out,” Federer said recently by phone from Melbourne, Australia, where he is attempting to defend his Australian Open title. “Everybody has a lot of fun.” Federer, despite a standing invitation, did not play in the SAP Open, which was held in San Jose until 2013. As with many Europe-based players, it was difficult to fit into his travel schedule. He has not been to San Francisco. His only trip to the Bay Area was a one-day visit to Google. He has legions of fans here. But unless they traveled, they haven’t seen him play…