Wednesday's all-MLS clash will go a long way to shaping the qualifier from Group Three, with the Impact on six points from two matches and Red Bulls three points from one - all those wins coming over bottom club FAS.
New York ended a three-match swing in seven days in the US top flight on Saturday with a 2-2 draw to Philadelphia Union, but tallied seven points from the fixtures to strengthen their standing in the Eastern Conference.
The Ugandan stopper said the call that he fouled Union's Pedro Ribeiro in the area was incorrect.
"I didn't foul him, I didn't foul him," Sekagya told the MLS official website.
"I just missed the ball the first time and the second time I touched the ball and then he fall down. I didn't touch him. I just touched the ball.
"It was just the pressure of the referee so that he can give them the penalty, but for me it was not."
"A little bittersweet at the end here because it's within the last minute that the PK [penalty kick] happened," said Petke.
"But seven points out of nine? We'll take it."
Their last trip to Montreal's Stade Saputo saw the two sides draw 2-2 in April.
Similarly, a Timbers' win at home to Honduran side Olimpia would take them level on six points atop Group Five with the visitors to Portland.
