Rafael Nadal could miss Spain's Davis Cup matchup against Switzerland _ and a potential showdown with Roger Federer.
``I don't know if I'll play,'' Nadal said Monday. ``Normally, I don't play the first round and at this moment I don't know if I will.''
Nadal and Federer both play only one Davis Cup series per season, and neither will commit to the first round matchup on Feb. 9-11 in Switzerland.
Nadal is 6-2 against Federer, including a win in this year's French Open final. But the top-ranked Federer beat Nadal in this year's Wimbledon final.
© The Canadian Press, 2007