Former champion Paulie Malignaggi offers this piece of advice to Manny Pacquiao, who is now preparing to face the unbeaten Floyd Mayweather: Use the jab properly.

The former IBF light welterweight and WBA welterweight champion said the only way to beat Mayweather is to disrupt his rhythm.

“You should know how to use a very good jab. You should know how to use a jab correctly, with patience, but be busy with that,” the boxer dubbed “The Magic Man” said in an interview with Fight Hype.

“Sometimes you gotta know how to use the jab on its own with speed and mixed rhythm and break Floyd's rhythm.”

The worst thing a boxer could do against Mayweather is to launch a combination after a jab Malignaggi said, noting that the undefeated American is very good at picking his shots.

“You gotta be patient and not throw combinations behind every time you throw the jab,” said Malignaggi. “I feel that that's the problem with Pacquiao. He doesn't know how to throw his jab on his own. If he throws a jab, he gotta throw combinations behind it.”

“You gotta watch him (Mayweather) all the time and if you don't watch Floyd, you're gonna get your ass kicked.”

Despite lacking knockout power, Malignaggi managed to pile victories by utilizing a slick defensive style. Of his 39 fights, he won 33 and lost six. Seven of his victories came by way of knockouts.

Malignaggi is also known as a harsh critic of Pacquiao and has repeatedly insinuated that the Filipino boxer was into performance enhancing drugs.

"For the rest of us who have a clear head and are looking at things diplomatically, it's kind of hard because who the [expletive] grows as much as Pacquiao was growing after their 28th birthday? Nobody grows that much," he said in an interview with Fight Saga years ago.

"Nobody gets that much bigger after their 28th birthday. No one is growing and filling out that much after they're fully grown. Especially a guy with Manny's genetics."