"I think England are going to hit the floor hard at some stage, but they could get to the semi-finals if they get past a tough, hardened Colombia team on Tuesday".
Southgate is hoping to lead England to their first knockout win since 2006 in Moscow, where he believes his side will rise to the "fantastic challenge" posed by Colombia and reach the quarter-finals.
"I think both sides are keen to continue that work at a faster pace than we have done up till now and certainly we would welcome that", she said today.
The result means Gareth Southgate's men finished second in Group G and will now face Colombia in the last 16 on Tuesday.
In a weird game, England made eight changes and Belgium nine as two B-teams contested first place in Group G, knowing that topping the group placed the victor in a far tougher half of the draw.
He's started all three of England's World Cup games so far (1,173 minutes) and looks to be central to Gareth Southgate's plans.
"We're aware the margins are going to be really fine in these knockout phases".
He added: "We don't like losing and don't want to lose matches, but the primary objective from the evening we've got".
His pass completion rate stands at 95 percent, and he's brought an air of calm assurance to England's backline.
"If England defend well, they will win - because, with the players England have up front, they will score".
"He was excellent on that, showed real leadership and understanding of the big picture". "I wasn't so comfortable with the love-in (before the game), to be honest, so nice that there's a little bit of an edge back".
Asked if he had put himself under pressure by making so many alterations in Kaliningrad, Southgate said: "Well, maybe I have, maybe I haven't".
"The players who've played tonight have given absolutely everything and never stopped". It looked like Colombia had 30,000 or 40,000 fans in the stadium for their last game. "But everyone understands - in the dressing room and in the group - what we're trying to do".
Japan are top and need just a point ($3.3) against already eliminated Poland to make sure they are the only Asian side to have a shot at glory.