The Spurs star is yet to find the net for his club this season.
Kane was a second half substitute in England’s 6-0 drubbing of San Marino and marked his third cap with his second goal for the Three Lions.
The Spurs frontman latched onto an excellent Jonjo Shelvey pass before delightfully lobbing the onrushing San Marino ‘keeper - dispelling any notion of a lack of confidence in front of goal in the process.
“I’m glad for him, because since the season has started he’s missed a few chances, and that really takes you back and you start to lose confidence,” Mullery told talkSPORT.
“But the boy is a goalscorer, he chipped the goalkeeper beautifully for his goal against San Marino, and that will give him a lot more confidence so when he goes back to Spurs he can start scoring again.
“He’s only 21 and he’s still learning his trade. He did his apprenticeship last season, where he got into the side and regularly scored goals, and now he’s got to prove to everyone that he’s not a one season wonder.”
Kane has struggle for clear-cut opportunities in Tottenham’s first four league games but was denied by Tim Howard in a one-on-one last Saturday, prompting claims that he has started to overthink his play in front of goal.
Mullery – who appeared 312 times for Tottenham between 1964 and 1972 – isn’t concerned however, and fully backs the 21-year old to return to form, adding:
’He’s a good player, there’s no doubt about it. He’s got the right attitude, he’s good to talk to and he’s very confident about his own ability.
“He’ll score goals again this season.”
Spurs fans will be be confident that Mullery's prediction will come true, but repeating the feats of last season will be no easy task for Tottenham's academy graduate.