The track cycling test event for the Olympic games has been cancelled because Rio de Janeiro's new velodrome won't be ready in time.
The event was due to take place on 30 April, but logistical problems mean the venue won't be completed until the end of May.
Organisers say the delay was due to problems importing Siberian wood which is being used to build the track.
"The track cycling test event has been cancelled and will be replaced by a training opportunity June 25th through the 27th," Mario Andrada told reporters.
"We are 120 percent confident it will be ready for the Olympics."
Andrada said the delay came in laying the track, which is made from Siberian wood.
"We had some logistical problems, such as unloading the wood into the venue and to install containers and offices, and we realised that it was too close for us to make sure that the track was perfectly installed," Andrada said.
South America's first Olympic Games begin on 5 August and run until 21 August.