Well I do feel that I carry the responsibility of representing my country wherever I am and this responsibility came with the success that I had in last couple of years not just myself but the whole group of tennis players that comes from Serbia. And athletes in general are in this moment the biggest ambassadors that our country has.
If a man cannot do brain work without stimulants of any kind he had better turn to hand work it is an indication on Nature's part that she did not mean him to be a head worker.
The human mind is capable of excitement without the application of gross and violent stimulants and he must have a very faint perception of its beauty and dignity who does not know this.