Toure has been impressed with Mignolet's form, saying when he plays well, the team tends to as well.
Toure said he was surprised by Mignolet's poor form earlier on in the season which led to him being left out of the side for four games before replacing Brad Jones in a Boxing Day win over Burnley.
He told the Liverpool website: "Simon is a great goalkeeper. I was expecting him to be better [than the start of the season] and what he's doing right now is amazing.
"On the header that they had, the save he made was crucial. I think he's been outstanding. Every time Simon is fine, the team is very strong as well.
"It was very important to keep the clean sheet. Right now I think we're playing really well as a team and we defend very well. We were unlucky not to score the crucial goal."
It's been some turnaround for Mignolet, and the Liverpool defensive unit altogether. Thanks to his save in the second half of yesterday's game, Liverpool remain in with a chance of making to Wembley when they travel to Ewood Park in April.
But keeping clean sheets seem to be something of a habit for the Reds now after a retched start to the season for their defence, having kept nine clean sheets in all competitions since the New Year.
However, with the defensive disruption recently with Mamadou Sakho's hip injury and the concussion suffered by Martin Skrtel in yesterday's game, there is a tough test ahead with how the goalkeeper and the back line operate as they have been pretty settled until recently.