World number one Serena Williams came back from a set behind to beat Timea Bacsinszky of Switzerland to seal a place in the final of the French Open, the second Grand Slam of the season. Despite struggling with illness, the top seeded American took 10 games in a row to win the semi-final, 4-6, 6-3, 6-0 last night. Serena, who is eying her third French Open and 20th Grand Slam Singles title, will meet Czech Lucie Safarova in the title clash tomorrow.Earlier yesterday, Safarova, seeded 13th, had stunned seventh placed Serbia's Ana Ivanovic, 7-5, 7-5 to become the first Czech woman to reach a Roland Garros final in 34 years. Meanwhile, the Men's Singles semi-finals will be played today. While world number one Novak Djokovic will clash with third placed Andy Murray, Frenchman Jo-Wilfried Tsonga will take on Swiss Stanislas Wawrinka.