"But to be involved in a World Cup is something you work all your life for".
"What I've discussed with the players is we must not waste any energy thinking whether it's better to be first or second in the group, who we might play in future rounds", said Southgate.
The leading goal scorers at the tournament so far are Harry Kane with five goals for England.
"We want to see every England fan coming over, especially now we are playing well".
The victor of group G will be decided on fair play ratings and England have collected two yellow cards to Belgium's three going into the tie. "We play against them near enough every week".More news: Colombia’s triple hammer blow dumps Poland out of World Cup
"His scoring record of goals per game is outstanding", said Southgate, who has yet to confirm the selection to his players but is well aware of Kane's desire to finish as the top scorer in Russian Federation.
He said: "For tomorrow I hope it will be a good game because I'm afraid second place may be better in the group".
"We've not won a knockout game since 2006, why are we starting to plot which venue would be better for a semi-final is beyond me really", Southgate said.
Of course, that's all assuming England can navigate their way past the last 16 stage; by no means a guarantee with Colombia one of three sides awaiting them alongside Senegal and Japan.
"It just shows that any team can be vulnerable", said Southgate, who more than most Englishmen has suffered at the hands of German footballers. We expect several changes to personnel, given the strength and depth in the England squad, and Southgate's desire to ensure that those he may need to call on in the knockout phase have had match minutes. Romelu Lukaku is definitely ruled out and both Eden Hazard and Kevin De Bruyne are expected to be rested as well. "We have to keep building that belief and building those experiences".
Belgium boss Roberto Martinez has made it clear he doesn't want to win and could make up to 10 changes. "We just want to keep winning and winning". A draw will take them into tiebreakers, where it could even go to fair play points (yellow cards, red cards) to decide who wins.