And in England's 2-1 defeat to Spain in the Uefa Nations League on Saturday, Manchester United left-back Luke Shaw had to be taken off midway through the second half due to a head injury.
"We were trying to correct one or two things but also challenge them a bit, it was an important night for us to finish well and we knew it would be hard because of the changes and amount of game time, but I'm really pleased because the players have given everything this week".More news: Trump Tells Apple to Make Products in United States to Avoid China Tariffs
The pundit says he is concerned over the 24-year-old's welfare after playing so many games in recent years.
But his side, containing nine changes from the weekend, was struggling even to cope with the Swiss' passing and movement as the visitors enjoyed almost 65 per cent possession before the break. "So I thought this is a good opportunity to do it".
While England had an impressive summer campaign at the World Cup, defying all expectations to reach the semi-finals over in Russian Federation, they did so with a relatively young and inexperienced side.
"So the idea of him being left out tonight, I don't think he should even be here".More news: Nicki Minaj throws shade at Cardi B after Fashion Week fight
Southgate also praised his players for the way they attempted to rectify their own problems themselves at the break in Leicester.
England returned to winning ways with a narrow 1-0 victory over Switzerland in an global friendly on Tuesday.
"I've gone back to Tottenham and had a pre-season there".More news: Sen. Bennet on why he’ll vote no on Kavanaugh