The men’s and women’s semifinals at the Australian Open should feature a little bit of everything. In the men’s draw, the world’s No. 1 player, a former Aussie Open finalist, and a premiere player from the United Kingdom looking to make Grand Slam history will be in action. The women’s semis feature the best player in our sport, an improbable pair of countrywomen, and an amazing comeback story. Women’s semifinal: No. 1 Serena Williams vs. No. 16 Li NaLi has won eight of her last 13 matches against players ranked in the top five. If she is going to upset Venus’ sister, Li will need to rely on her defensive skills. She has an outstanding return game and has extended rallies well in Melbourne. Serena pulled off one of the greatest escape acts of her career against Victoria Azarenka. The top-ranked American seemed bothered by a leg injury and couldn’t sustain any rhythm to start the match. When the 20-year-old from Belarus moved ahead 4-0 in the second set, it appeared the match was over. But Williams asserted herself rallying to take the set in a tiebreaker and easily won the third set 6-2 to wrap up the match.Just when…