 Complete the following phrase:  The following year, the format for the Fed Cup changed again. The entire competition was played out in November. The three round robin pools were reduced to two and the winners of each pool would contest a final tie for the title. Belgiums team of Clijsters, Henin, Callens, and Courtois from the 2000 final all returned for 2001. The United States withdrew before the start of the event, citing security concerns a few months after the 