The 24-year-old was on the wrong end of an FA tweet which mocked his display in the defeat to Manchester United in the FA Cup semi-final, claiming Chris Smalling had him in his pocket.
Most observers found it unbelievable that on the eve of a World Cup campaign the FA could be so crass as to mock the man who's goals will be crucial in Russia and it is clear the England manager did not think much of it either.
Spurs boss Mauricio Pochettino had been critical about the post, and Southgate said: "So was I!
"We immediately recognised it wasn't an area that I think we need to be involved in.
"(We had a) good internal discussion, we had an apology pretty quickly to Harry and to Tottenham, so it's done. I only (spoke to Kane about it) as part of a broader conversation about everything.
"We didn't spend long on it at all. He'd moved on from it and that was that."