Lemieux waded in and threw a big right that not just missed the target, but nearly ended up outside the ring. As of the second round I couldn't use my left hand the way I wanted to.
It left the commentators in stitches, but the raucous Canadian crowd showed their anger with the taunting by booking the Sheffield-based fighter.
Saunders retained his WBO middleweight belt easily in Quebec on Saturday, earning a unanimous decision that was never in doubt.
The Canadian had won his four bouts since unified middleweight champion Gennady Golovkin stopped him in 2015.
His first clean punch came in round three but it was not enough to stop Saunders, who retaliated with a combination uppercut in the fourth.
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Saunders had Lemieux off balance from the outset, making the Laval resident miss while darting in to land shots seemingly at will.
Saunders outclassed the power-punching Lemieux, landing 165 of 430 punches while Lemieux landed only 67 of 356 punches, according to CompuBox.
The Englishman was a convincing victor on all the judges' scorecards - 120-108, 117-111, 118-110 - as he meted out the fourth defeat of Lemieux's career.
"In my own mind, I know I can deal with (Lemieux), and then with Golovkin or Canelo, we'll see where I really am".
"Golovkin, you kept saying you want my WBO belt when I was 14 stone [196-pounds], out of shape and wasn't in love with boxing", he said in an interview shown on BT Sport.