 At the 2009 World Rowing Championships the four's main rivals were the Australian silver medal four from Beijing who had stayed together to avenge the GB victory at the Olympics.GB won the gold medal, almost two seconds ahead of Australia with Slovenia in third.At the 2011 World Rowing Championships in Bled, Slovenia, Gregory raced in the men's four with crewmates Matt Langridge, Richard Egington and Tom James, winning a gold medal ahead of Greece in second and Australia in third.