Windsor 2 Owen Sound 1
Nathan Staios scored the game winner with less than two minutes left in regulation and Windsor edged Owen Sound 2-1.
Sergey Popov had the Attack's lone goal, assisted by Aidan Dudas and Andrew Perrott.
Mack Guzda stopped 31 shots and was awarded third star honours in the game.
Kitchener 3 Kingston 2
Joseph Garreffa's goal midway through the second would stand as the game winner and Kitchener hung on for a 3-2 win over Kingston. Garreffa also had an assist in the win.
Jonathan Yantsis and Donovan Sebrango also scored for the Rangers.
Mississauga 9 London 4
Kevin Hancock scored back-to-back goals in the first period to give the Knights a 2-0 lead but they let it slip, losing 9-4 to Mississauga.
Liam Foudy and Connor McMichael also scored for London.
The Steelheads were led by Aidan Prueter with a pair of goals.
Former Attacker Alan Lyszczarczyk, Cole Carter, Nick Isaacson, Cole Schwindt and Keean Washkurak all scored and had an assist in the win.
Guelph 5 Flint 4 (OT)
Dmitri Samorukov scored the game winner 1:13 into overtime and Guelph edged Flint 5-4.
Cody Morgan led the Firebirds with a hat trick.
Isaac Ratcliffe, Liam Hawel, Cedric Ralph, and Domenico Commisso all had a goal and an assist in the win.