It was a very close battle, especially at the end. Oliver who showed an opening to exploit was astounded by Matthew's sudden increase in speed. The tip of Matthew's sword was near Oliver's chest, but was stopped by Oliver who had pinched the tip of the blade using his index finger and thumb. The only reason he was able to do this feat was because of his incredible strength.
So in the end Oliver was somehow able to stop Matthew's attack and at the same time counter. Oliver was able to stop his blow before hitting Matthew, but the sheer force of the attack was actually able to make Matthew's neck bleed a little, even though it didn't hit.
"The winner is Oliver." The moment they heard Alex's announcement the two combatants, Oliver and Matthew lowered their weapons. Matthew who had used an excessive amount of stamina, lay flat on the floor with a smile on his face.