The No. 1 ranking may be beyond Amelie Mauresmo's reach in the Nasdaq-100 Open. She'll settle for winning the tournament. The top-seeded Frenchwoman advanced to the semifinals by beating 17-year-old Ana Ivanovic 6-1, 6-4 Wednesday. Mauresmo, who spent five weeks at No. 1 last year, will regain the top ranking only if she defeats a top-five player in the final.