Diana Ross will perform, and Jimmy Connors, John McEnroe, Chris Evert and Venus Williams will participate in next week's opening night ceremony at the U.S. Open.

The focus will be the renaming of the U.S. Tennis Association National Tennis Centre in honour of former Tennis player and pioneer Billie Jean King.

The WTA has today announced its plans to test out on court coaching.

Tennis players will be able to summon coaches courtside during changeovers and between sets in a test starting next month, by the Sony Ericsson WTA Tour at tournaments in Montreal and New Haven, Conn. The tour expects to test the system in singles and doubles.

Former world no 1 Serena Williams has not played on the WTA tour since losing in the third round of the Australian open. She has missed both the French Open and Wimbledon becuse of the same left knee injury.