The England boss added he would "probably know" his starting XI for the Group G opener against Tunisia in Volgograd on June 18 "if it was tomorrow", but insisted there was still plenty of time for players to stake their claim. "We have a lot of attacking flair that can do some damage".
However, if Southgate's plans to steadily progress at this World Cup do not materialise, Ferdinand says he should still keep his position as England head coach.
Southgate hopes the atmosphere of the Country Club ForRest Mix in Repino, on the Gulf of Finland and less than an hour away from St Petersburg, can help continue the squad's positive mindset which has grown during the course of the warm-up matches.
Throughout the 2017/18 campaign, Rashford made a total of 52 appearances for the Red Devils across all competitions, scoring 13 goals and assisting a further nine, helping earn his place in England's 23-man World Cup squad. "But for us it's to play attacking football, to score, and that's important", he said.
The Tottenham forward believes the squad can build on a positive atmosphere within the camp.
"We are aiming to win the first game, then to target the second, and take that attitude to the World Cup".
"We are really pleased with the base and looking forward to getting to meet the community there a bit more". However, the young striker may yet be forced to miss the Three Lions' opening game against the Eagles of Carthage.
The showpiece event in Russian Federation will be Kane's first World Cup, having previously played for England at Euro 2016 and in the 2015 Under-21 European Championship, but the Tottenham striker wants to break his duck of never scoring at a major tournament.
There are widespread concerns surrounding racism on the eve of the World Cup, with the Russian Football Union fined £22,000 by FIFA for racist chanting in a March friendly against France in St Petersburg.
Kane also took issue with Ferdinand who told The Times last month his priority had been winning trophies with Manchester United.
"We hope we can send people to work the following day having enjoyed our matches, I know what those tournament experiences can be like and we desperately want to bring that", he said.
"And if it's public you've got to hit a level of performance, you've got to entertain the supporters, and maybe all the players aren't ready to go again".