Ferjani Sassi made no mistake from the spot, and England were left to struggle against a resolute backline until Kane finally ensured three points with a last-minute header to make it 2-1. But after Kyle Walker softly conceded a penalty that Ferjani Sassi converted in the 35th, numerous fouls went against England.
Southgate believes England's players are as prepared, focused and ready as they can be for their eagerly anticipated World Cup opener.
The North Africans were level in the 34th minute when Kyle Walker caught Ben Youssef with his arm on a cross and the referee pointed to the penalty spot.
England made a stuttered start to their 2018 FIFA World Cup campaign but beat Tunisia 2-1 at the Volgograd Arena on Monday to move up to second in Group G thanks to a stoppage-time victor from Harry Kane.
England controlled all the possession at the start of the second half, but for all their dominance they couldn't break down a resilient Tunisia defence.
Tunisia are making quite the surge in the world rankings, however I think this is one of the easier picks in the opening round of matches. In the first half, a John Stones shove on a Tunisia defender at a corner probably negated the rugby tackle on Kane seconds later.
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'We've got this result over the past few weeks and that's because of everyone.
"Maybe there was a bit of justice at the end", Kane said.
Lineker posted via Twitter: "Get in you f***ing beauty".
In this year's tournament, the draw put two of the four longest shots in the 32-team field in Group G - Tunisia and Panama - putting the expectation on England and Belgium to reach the knockout stage.
Young drifted a free-kick well over the bar and England's chance at victory appeared to have gone.