Former world champion Krzysztof Glowacki knocks opponent Silgado out cold in one round

Former WBO cruiserweight champion Krzysztof Glowacki knocked Santander Silgado out cold in one round Saturday at Hala Sportowa Poland.

Glowacki (30-1, 18 KO's), 31, who hails from Poland, landed a massive left hook to the temple of Silgado, who was out for several minutes.

Glowacki has won four consecutive bouts after losing his cruiserweight world title to current titleholder Oleksandr Usyk by unanimous decision in September 2016.

Silgado (28-5, 22 KO's), a 33-year-old Columbian, has lost two out of his last three fights by first-round KO.