Flushing Meadows, NY -- (Sports Network) - U.S. Open officials made contingency plans due to the expected arrival of Tropical Storm Hanna this weekend, and it could push the women's final to Sunday night and the men's championship match to late Monday afternoon.

Hanna was moving up the Eastern seaboard Friday night and rain was in the forecast for Saturday. The U.S. Tennis Association said that wet weather was expected to begin late Friday night and last until early morning before subsiding Saturday afternoon.

Therefore, the start of Saturday's men's semifinals has been moved up an hour to 11 a.m. (et) when four-time reigning champion Roger Federer takes on Serbian Novak Djokovic, Top seed Rafael Nadal and sixth seed Andy Murray will play after that match, and the women's singles final between American Serena Williams and Serbian Jelena Jankovic is slated for the night session.

If rain wipes out all play Saturday, the men's semifinals would take place Sunday, starting at 1 p.m. and the women's final would be at 9 p.m. In that case, the men's final would be at 5 p.m. on Monday.

If the men's semifinals are finished Saturday and the women's final isn't, then both championship matches would be scheduled for Sunday, one at 4 p.m. and the other at 9 p.m.