I was playing in the Presidents Cup tournament at Waubeeka Golf Links in Williamstown, Ma.. Going to the 16 hole the match was even. I played the hole the previous day and hit my tee shot in the bunker. This day had the same placement due to heavy rains the night before. I decided to not try and aim for the pin. I did not want to go into the trap again. I hit the Pro-V1 to the left on the green and after it hit it rolled above the green slightly. It then started to roll back onto the green and moved slowly down hill. After it rolled about 20 feet it disappeared. I thought the ball rolled to the lower tier. My opponent was the first on the green and said "I do not see your ball on the lower tier. It is not on the upper tier either. Let me check the hole. He then bent down and took the ball out and said "here's your ball", CONGRATULATIONS!!! I won the match on the 21st. hole.