Bruce's individual combat skills were on par with those of Sword Dragon, and insignificant details were not enough to determine the outcome of a battle. The key factors were timing and luck. Unfortunately, he was injured, which hindered his ability to attack. Feng Yi hoped that Bruce could replace one of them, but Duolin's rapid movements made it difficult for Bruce to counterattack, thus, Sword Dragon became his most likely target.
As desperadoes, they knew that when pushed to the edge, they would fight to the death. Sword Dragon and Duolin understood this, hence their actions were measured perfectly. Instead of rushing to attack or applying excessive pressure, they kept circling around their enemy. This "slow-boiling a frog" method of steadily draining their foe's energy was a sure way to victory; it was simply a matter of time.