Dupuy was pressed into kicking duty with Flood in the sin-bin, and the Frenchman held his nerve to ensure Leicester secured their third straight win under new coach Heyneke Meyer.
And the world number 49 held his nerve to maintain his momentum in the third set and close out the match, breaking down with joy as he ousted the legendary Swiss.
Hutchins also struggled on his serve and found himself break point down serving to stay in the set at 2-5, but although he held his nerve, Matkowski was rock solid on his serve to give Poland the third set.
Arvind Mahankali, a 12-year-old seventh-grader from New York City, came in third when he misspelled "schwannoma, " a tumor of the sheath of a peripheral nerve.