Britain's Audley Harrison is guaranteed at least a bronze medal after beating Oleksii Mazikin 12-6 in the super heavyweight boxing division.

Harrison will go on to meet Italian Paolo Vidoz in a semi-final bout on Friday.

If he wins that fight, he will be boxing for gold or silver on Sunday.

Harrison won three quick points with a third round flurry of punches. Another combination in the fourth round, also brought three points, and Mazikin's fate was sealed.

Harrison, the Commonwealth Games champion, said he had been fired up by compatriot Steve Redgrave's fifth rowing gold medal.

"I was watching it and I got a boost off that. We can go abroad and win, we can win gold medals and be great. I haven't come here to go home," he said.

Harrison was also impressed by Princess Anne, who joined him and light-heavyweight Courtney Fry at their dinner table.

"That's a great boost for me, it's a great boost for boxing. I don't think the Princess has come to too many boxing matches," he said of the British royal better known for her love of equestrian events.

And now British boxing hopes rest entirely on the shoulders of this talented fighter who could even surprise a few people and improve on that bronze medal position.