Preparations for the 2014 Sochi Winter Olympics are well underway, but there’s still much to be done with just 100 days to go before the Games begin.

“These last 100 days will be the toughest ones in the preparations,” said International Olympic Committee president Thomas Bach, who is touring venues to ensure they will be ready in time.

“By experience, we know that the last stretch is always the most important one.… The decision is taken on the last lap of a race and we're in the last lap.”

Although most sporting venues were completed a year ago, Sochi Olympic Park is still under construction.

Workers are scrambling to finish the athletes’ housing facilities in time, but the 40,000-seat stadium designed for the opening and closing ceremonies isn’t finished either.

The president of the Sochi 2014 Olympic Organizing Committee, Dmitry Chernyshenko, remains unfazed.

“Yes, no doubt it will be ready on time for the scenic opening ceremony. Don't be worried,” he said.

“It's absolutely on track with the schedule and rehearsal will start on 15th of November.”

The Sochi Olympics opening ceremony takes place on Feb. 7.