"We'll just have to assess people as we go", Southgate added.
Pickford was criticised by his opposite number Thibaut Courtois for being too short to stop Adnan Januzaj's shot when Belgium beat England 1-0 in their final group-stage game, the Three Lions' only defeat at Russian Federation 2018 so far.
Jordan Henderson has hailed England's camaraderie under manager Gareth Southgate, citing team spirit as one of the side's key weapons as they prepare for Wednesday's World Cup semifinal against Croatia.
"Playing in those big games is something special and it gives you confidence to know that you can perform at the very, very top against the best players in the world and I've just tried to continue that with England". Of course, I want to win. It's down to what we do behind the scenes, what we work on in training, all the hard work to get here.
Pickford only made his full England debut in November 2017, just seven months before the World Cup in Russian Federation, but he made crucial saves in the team's round-of-16 penalty shoot-out victory over Colombia.
Henderson takes "a lot of good things from the past in terms of 66 and what they achieved then" but is not getting ahead of himself given the threat posed by Croatia.
"I just keep seeing texts saying, 'Yes England!".
"I can't pick one of them out".
"I think he's had his fair share of criticism over the previous year or so, but he's done so well over the last six months, really, especially after the start of the season".
"How many goalies are out of the World Cup?"