Hartlepool Rugby lost their quarter-final 24-14 at the Bangkok International Sevens where they were edged out by two late Wiss tries.
The united town squad looked in charge in the first match of the knock-out stages when they led 14-12 going into the final two minutes of normal time, only to concede twice.
Wiss took advantage of a third-minute overlap to go 5-0 up, but Hartlepool hit back before the interval, Jack McCallum making a break before showing great determination to go over under the sticks, Cameron Lithgo converting.
It got even better early in the second minute, Liam Bailey making a strong run from a tap penalty to find Lee Maddison. He carried on the attack before putting the supporting McCallum over for his second touchdown. Liam Austwicke converted from wide on the left to make it 14-5.
Wiss hit straight back when their wide player ran 60 metres to score a converted try.
Leading 14-12, Hartlepool needed to hang on but after losing possession in their own 22, the Madrid team capitalised with a converted score.
Michael Ainslie's side required a dramatic finish but Wiss added the final score with a chip and chase.