He wasn't finished.
"Today, they didn't cause us any trouble," said Preki, whose team fell to 6-5-4 after a 4-0-4 run in its previous eight games.
"We made a couple of mental mistakes and lost the game, and it was as simple as that."
The Union have a reputation for playing hard the entire 90 minutes and often beyond, and that persistence paid off.
Sebastien Le Toux converted a penalty kick in the 95th minute for the winner. The Union earned the penalty kick on a hand ball by Toronto's Maksim Usanov off a shot in the box from Union forward Jack McInerney.
It was another stellar game for Le Toux, who also assisted on the first goal. He has seven goals and seven assists this season.
The reserves for the MLS All-Star Game on July 28 against Manchester United in Houston will be announced Monday, and all indications are that Le Toux will be named. He says he hasn't received any word yet.
"It would be nice to be included, but it's more important that we keep getting three points," Le Toux said in an almost cleared-out locker room.
The best scoring chance in a scoreless first half came in stoppage time, when Union defender Jordan Harvey hit the post from close range after a great feed from Le Toux.
The Union took a 1-0 lead in the 61st minute when defender Michael Orozco Fiscal headed in a Le Toux corner kick for his first MLS goal. Orozco Fiscal drilled it by the near post, with little room to spare.
"We practiced that play all week," Orozco Fiscal said. "A lot of times, I flick it to somebody else, but I was close enough to the goal and decided to go for it."
Toronto tied it on Chad Barrett's header in the 81st minute off a Dan Gargan throw-in.
After the equalizer, the Union kept pushing up offensively, and Toronto appeared intent on playing for a tie.
So is this team improved, or was Preki's assessment correct? Naturally, the Union had a different perspective.
"We've improved a lot," Orozco Fiscal said. "We are never going to stop going at teams 120 percent."
Contact staff writer Marc Narducci at 856-779-3225 or mnarducci@phillynews.com.