The World Group Play-offs were four ties which involved the losing nations of the World Group first round and the winning nations of the World Group II. Nations that won their play-off ties entered the 2011 World Group, while losing nations joined the 2011 World Group II.
Note: Ana Ivanovic decided to withdraw from this tie in March due to her ongoing poor form.
References
2010 Fed Cup World Group Play-offs Wikipedia(Text) CC BY-SA