Nikolay Goldobin's four goals, including one in overtime, lifted the Sarnia Sting to a 6-5 victory over host London that ended the Knights' 24-game winning streak Tuesday.
London (32-5-3), which was just one win short of the Canadian Hockey League mark of 25 set by the 1983-84 Kitchener Rangers, led 3-0 after the opening period and later owned leads of 4-2 and 5-3.
Goldobin, who is not eligible for the NHL draft until 2014 and is a Russian import, is now tied with Erie's Connor McDavid for goals by a rookie with 18.
Alex Basso and Justice Dundas also scored for the Sting (21-13-3), who lost 3-2 to London on home ice Monday. Anthony DeAngelo chipped in with three assists.
London had built its 3-0 lead in the first intermission on goals by Max Domi, Brett Welychka and Bo Horvat. For Horvat, it was his 11th goal in his past 13 outings.
Chris Tierney and Nikita Zadorov also scored for London, while Seth Griffith earned three assists and now leads the OHL scoring race with 25 goals and 64 points. Griffith passed Ryan Strome of Niagara who is playing with Team Canada at the world junior hockey championship.