Olympics

He competed for Denmark at the 1906 Intercalated Games, in the Greco-Roman heavyweight class and in an open weight class for all Greco-Roman competitors. In the very first round of the heavyweight class he faced the Austrian wrestler Arnold, who he considered to be his greatest threat in the competition. After an hour of wrestling, Jensen emerged victorious.^[3]

In the second round he faced Ronti, of the German team who weighed in excess of 120 kilograms (264 lbs). Following a victory against the German, he faced and defeated the Belgian Debouis and then Bauer from Austria in order to win the gold medal in the heavyweight class, at which point King George I of Greece called out to him in congratulation.^[3] Following that gold medal, he competed once more in the open competition, winning that competition as well and a second gold medal.^[3]

He competed at the following two Olympic Games, winning the bronze medal in the Greco-Roman super heavyweight event at the 1908 Summer Olympics and another bronze medal this time in the Greco-Roman heavyweight competition at the 1912 Summer Olympics.^[3] At the 1912 Games he actually made it to the deciding match to find out who would win the gold medal, against Finland's Yrjö Saarela. After three hours of wrestling in the open air, Jensen retired from exhaustion on a particularly hot day.^[4]