Former tennis world number one Andy Roddick revealed he had a cancerous tumour removed from his lips. He opened up to fans about his ongoing struggle with skin cancer during this week’s episode of his podcast, “Served.” “I’ve dealt with various types of skin cancer since I stopped playing,” the 2003 US Open winner said. Roddick, who ended his career in 2012, had a tumour removed from his lips “five or six years ago,” he said, adding that the problems will probably accompany him for the rest of his life. “I haven’t ever talked about it,” he said. “It stinks. I think I’m going to be a general ki…