Phelps has unfinished business at Worlds

INDIANAPOLIS: With 14 Olympic and 17 world championship gold medals already in his possession, it is hard to imagine what Michael Phelps might have left to accomplish in a pool.

But the 24-year-old has arrived in Rome for the world championships, which start on Sunday, with unfinished business.

What that business might be, Phelps has refused to say.