England sailed through to the knockout stages of the World Cup on Tuesday with a 3-0 win over Wales.
Speaking on The Gary Neville Podcast, the former Manchester United defender was reviewing the match.
Southgate made a number of changes to his starting line-up to rest a few key men.
It also gave a number of England stars a chance to break into the team ahead of the last-16.
One player that was given his first start of the competition was Liverpool captain Jordan Henderson.
Henderson was brought into the midfield in place of Mason Mount, allowing Jude Bellingham to play further forward.

Liverpool’s skipper was heard screaming at his teammates throughout the match as he led from the centre of the field.
However, Neville was very unimpressed with one incident on Tuesday involving the 32-year-old.
Neville was angry with the tackle from Aaron Ramsey on Henderson on the hour mark.
Ramsey was late with a studs-up challenge on Henderson that caught him straight on the ankle.
It resulted in the Welshman being booked, and Henderson needing treatment from England’s medical staff.
He managed to play the full 90 minutes, but Neville was seriously unimpressed.
Neville angry with Ramsey tackle with Henderson
Speaking on his podcast, Neville explained what he didn’t like about the foul on Henderson.
“I didn’t like it,” Neville said.
“I thought it was a coward’s tackle, I thought he knew what he was doing.
“Jordan just had something with him on a different part of the pitch, I watched them half follow each other, and I thought it was a naughty one that.”
The £20m midfielder will make his 10th World Cup appearance if he plays against Senegal on Sunday.

He’s been impressing with his finishing in training, although international goals have always been hard to come by for Henderson.
Neville has every right to be angry about the tackle on Henderson, but thankfully he came away from the incident unscathed.
He’s now given Southgate a difficult decision to make as he tries to figure out the balance of his midfield.
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