Three-time Olympic gold medallist Matthew Pinsent has advised the British team not to panic about safety at the summer Games.
Pinsent says safety must come first for the team
In the wake of Wednesday's bomb blasts in Athens, Pinsent said he had every confidence security would be sufficient for August's event.
He said: "You cannot have worries like that. You have to concentrate solely on what makes your performance better.
"Things like security... are all things beyond your individual control."
A trio of explosions went off outside a police station in the Greek capital on Wednesday, exactly 100 days before the Games are due to start.
Of potential future threats, Pinsent added: "You take them into consideration and try to prepare for what may come up but it's not my job to worry about it and you shouldn't let it affect the way you prepare.
"Steve and I were in Atlanta and the morning the bomb went off we were due to race. People were killed in that bomb and it sounds inhumane and selfish but we had an Olympic final to race and we had to concentrate on that."
The 110m world record-holder Colin Jackson also advised the British team not to panic before the sporting showcase.
"I think they need to concentrate and worry more about the opposition than the security," said Jackson. "I'm sure everything will be fine."
But British Olympic chief Craig Reedie said he expected "serious updates" when he travels to Athens next week as part of the International Olympic Committee's co-ordination sub-commission.
Reedie, the British Olympic Association (BOA) chairman, told the BBC's Today programme: "What is important is that the sports facilities are finished in time to make them secure and, having made them secure, to keep them secure.
"I suspect this is a fact of delays in construction and, once we get to a certain stage and sufficient construction work has been completed, then you will secure the site. We will make it secure and keep it secure."
BOA chief executive Simon Clegg insisted Wednesday's bombings would not cause the team to pull out of the Games, while UK Athletics chief executive David Moorcroft said he had no doubts in the Athenian organisers.
"Security must be the highest priority and we are confident both the Greek organisers and the International Olympic Committee will be taking all the necessary measures to ensure this is the case," said Moorcroft.
"I am also sure the BOA will also be working with the Greeks and the IOC along the same lines to ensure security for everyone is paramount."