Updated

Sebastian Coe has delivered his final report to the IOC before the start of the London Olympics, declaring that organizers have lived up to the promises they made when they secured the games seven years ago.

The International Olympic Committee offered high praise for Coe and his team and said it expects the games to be a major success, despite the continuing challenges with security and transportation ahead of Friday's opening ceremony.

IOC President Jacques Rogge says "now comes the crucial delivery phase — I remain very optimistic."

Coe, a two-time Olympic gold medalist in the 1,500 meters, led London's winning bid for the games and has headed the organizing committee.

He was accompanied Tuesday by a delegation of 20 young people who were part of the bid presentation in Singapore in 2005.