BOSTON (USA): Former New York Marathon champion Shalane Flanagan admits she might require knee surgery if she plans to return to elite level racing, informs NBC Sport. “My knees are not doing so well. They’ve been hurting. So I have to figure that out. I may need surgery. I’m not sure. That’s kind of scary. But I know that it’s going to pass. I’m going to be better for it. And I’m going to appreciate my health when I can do a lot of running,” she said.