PARIS, June 17 (Reuters) - Former world champion Eunice Barber of France has decided not to compete in heptathlon at the Beijing Olympics in August to concentrate on the long jump, her agent said on Tuesday.

The 33-year-old Barber, world heptathlon champion in 1999 and long jump champion in 2003, underwent knee surgery in September last year.

She will resume competing at a meeting on Wednesday in Grenoble, France, where she plans to enter the long jump and possibly the 100 metres, said her agent, Denis Auguin.

"She won't do heptathlon at the Olympics, just long jump," Auguin told Reuters.

"The Olympic qualifying event for heptathlon is in two weeks and she won't be ready," he added.

The Sierra Leone-born athlete has not completed in heptathlon since finishing second to Sweden's Carolina Kluft in the event at the 2005 world championships in Helsinki.

Barber has never won an Olympic medal. (Reporting by Clement Guillou, writing by Patrick Vignal in Vevey, Switzerland, Editing by Clare Fallon)