TENNIS titan Serena Williams, who last dated director Brett Ratner, has a new man. The 2003 Wimbledon champ, dressed in a shiny baby-doll dress, was spotted holding hands and getting “very close” with rapper Common last week at Tenjune during a party for her sister Venus. “They were very friendly, arm-in-arm. She looked great,” said a spy. “All night they were sitting together. They were keeping it cool, but you could tell Common likes himself some Serena. I asked a ...