The former Everton and Wigan manager acknowledged that he understood the importance of the fixture for his Premier League players on his squad, but said it would be unprofessional of him if key players missed out in the latter stages.
"The reality is that we have qualified - you are only as good as the 23 players".
"Both teams will try to press each other very high and try to win the ball and dictate play".
The victory also meant that having trumped Panama and Tunisia, the Belgian team is now on top of Group G, with their final game against England to be held on June 28.
Meanwhile Belgium head coach Roberto Martinez has claimed he could make a number of changes for the dead rubber, with injuries and possible suspensions to consider.
Lukaku's worldwide scoring record now stands at 40 goals in 71 outings as he continues to extend his lead as Belgium's all-time top goalscorer at the age of just 25. "He's gone ahead of some major, major names in English football history in terms of World Cup goals", Southgate said.
They are likely to rest and rotate when they meet England, who are also in the relatively novel position of not needing a result from their last group game to progress.
"As a kid I never thought I could get a chance to play for England, never mind score".
Toni Kroos rescued holders Germany from the brink of an unthinkable early World Cup exit early today, curling home a sensational victor in the fifth minute of stoppage time to seal a 2-1 win over Sweden, reports AFP.
There's one more reason why the Belgians and English may not be desperate to roll out their big guns in Kaliningrad. "It must have been a great game to watch as a neutral but there are lots of things we need to work on and that starts tomorrow", he said. Mexico's 2-1 win over South Korea earlier on Saturday had ensured that Germanywould be out in the event of a defeat, with a draw little better.
These were Belgium striker Romelu Lukaku's words as he recently documented his moving life story of struggle, grit, guts, audacity, and the glory that came with it.