Kane shone after scoring England's first goal.
And, having carried that form into the World Cup, Kane - who failed to find the net at Euro 2016 - claims to have put no limits on what he can achieve. "They kept going, kept going to the last second". Kyle Walker elbowed a Tunisian player and gave away a penalty which was converted by Ferjani Sassi. So maybe there was a bit of justice at the end to get one at the back post.
Finally, Kane showcased on the worldwide stage the predatory instinct in front of goal that has served Tottenham so well.
Two years ago during the European Championship, Harry Maguire was a fan in France watching his beloved England.
"We had to keep monitoring Dele", said England boss Gareth Southgate on Monday. "Togetherness and believing in ourselves".
Asked about England's win, Kane told BBC Sport: 'It's massive.
The Tottenham star followed up a John Stones header that was initially saved by Tunisian keeper Hassan.
England had penalty claims of their own turned down before struggling to maintain their intensity after halftime.
England pushed in search of regaining the lead throughout the second period - and they did so in the 91 minute when Kane glanced in the victor. Both times, the referee decided against punishing the culprits.
But it was to be England's day as, in the first minute of added time, again from a set piece, another African team was found out.
'We have got the ice baths, the pool, nutrition where we have got a great chef here, great nutritionist making sure we get everything we need.
England seemed destined for a familiar hard-luck story - dominance with little to show for it.
Lingard then missed a fine chance to double the lead when picked out at the far post by a lovely ball from Ashley Young, but he got his feet all wrong with the goal at his mercy.
"Harry is a top, top striker", Southgate said. "The control from the back with the ball".
According to Rumsby's report, referees were consulted on certain zero-tolerance issues-including grappling-before the World Cup. He's also scored eight goals in the six games in which he has worn the armband for England.
Tunisia was forced into an early goalkeeping change.
Hassen, though, was forced off in the 15th and replaced by Ben Mustapha. Panama were beaten 3-0 by Belgium earlier on Monday.
Grappling at corners has become endemic in the game but, according to England's former Federation Internationale de Football Association referee Graham Poll, it is one area VAR was brought in to tackle but failed to do so in Monday's game.