But he still lost.
Sundin beat Auld in the shootout with a high shot to the glove side.
"The most frustrating thing is knowing exactly Mats is going to do and he still puts it by you," Auld said. "Every shootout he puts it upstairs. That's his thing."
Auld even got a scouting report from former Leafs goalie Ed Belfour, who told Auld that Sundin would go high.
Tucker followed with his goal that won it.
Sundin said Auld was outstanding, but was amazed by how many chances his team has missed this early season.
"To be honest with you, I don't think I've seen games like this in my past eight years with the Maple Leafs," Sundin said. "You look at the scoreboard and we got 40 shots after two periods and it's 0-0 and then you're down one, but we showed a lot of character."
Kyle Wellwood scored and Raycroft made 24 saves for the Maple Leafs, who lost in a shootout to Montreal on Saturday
Toronto defenseman Pavel Kubina had to be helped off the ice late in the third after Bertuzzi's knee collided with his. Toronto signed Kubina to a $20-million, four-year deal in the offseason.
Toronto coach Paul Maurice wouldn't provide details of the injury but suggested that Kubina would play through it. Kubina will go for further tests on Tuesday.
"We'll see how bad it is for Kubina. We're going to need him," Sundin said.
Stephen Weiss scored a power-play goal for the Panthers.
Raycroft stopped Jay Bouwmeester on a breakaway with a blocker save in overtime. Auld also made a number of impressive stops in the extra period.
Belfour allowed six goals in a loss to Atlanta on Thursday and was expected to start against his former team, but Panthers coach Jacques Martin went with Auld, who was outstanding throughout.
The Maple Leafs continued to have trouble converting scoring chances.
Auld robbed Darcy Tucker of a power-play goal with a spectacular glove save just minutes after Florida took the lead.
"He earned a point for their club," Sundin said.
Toronto went 0-for-6 on the power play.
After Bertuzzi fired a shot off Raycroft on a power play, Gary Roberts put another shot off the goalie before Weiss' backhander gave the Panthers the lead at 3:56 of the third.
Tucker found Wellwood streaking toward Florida's end with a nice pass midway through the third. Wellwood skated in alone before his slap shot beat Auld at 11:17.
Toronto recorded 16 shots on Auld in the first period and had two near goals reviewed by officials. Sundin's shot on the power play deflected off the post and almost went in, but Florida defenseman Bryan Allen cleared the puck just as it was about to cross the line.
- Fans booed when it was announced that Auld would start instead of Belfour, who spent three seasons in Toronto before being bought out of the last year of his contract.
- Bertuzzi was booed when he first touched the puck in the opening period.