Giovinco also missed a penalty in the topsy-turvy contest, but Vanney heaped praise on the diminutive 28-year-old, who has scored 11 goals in 17 games since arriving at the BMO Field from Juventus at the beginning of the campaign.
"You see what he's capable of doing on a day like today because he brought out a lot of skills and treats," Vanney said.
"But every game is different. Today, he showed what he's capable of doing.
"This one has to go down as one of his best games for sure, he was excellent."