Athens:The 100-metre Olympic champion Maurice Greene may find his title under assault from the reigning world champion Kim Collins. Collins, who hails from the tiny island of St Kitts in the West Indies, won the 100 metres gold at the World Atheltics Championships in Paris last year. "When I won the World Championships in Paris, the people in St Kitts went totally crazy. Everybody was celebrating," said Collins Build up to Athens Collins, who finished a poor seventh at the Sydney Olympics, hasn't had an ideal build up to Athens. He finished seventh at the recent Zurich grand prix. Asafa Powell from Jamaica outdid him and Olympic champion Maurice Greene to win the race. Collins, however, knows that what really matters is how he performs at Athens. "Well I'm preparing the same way, but putting in a little bit of extra work. I'm training hard and regular, coming in to practice more days than I have. So I'm really going the extra mile in terms of making sure that I'm not injured," he said. However, Collins is ready to withstand pain and pressure just for the pleasure of earning the tag of the fastest man in the world.