England are coming into this game as heavy favourites and while they've not necessarily been the most convincing team in the group stages, this is still a game they should win. England's creative problems are well-publicised, with Southgate's side managing an overall xG rate of 2.2, but Slovakia's is hardly any better at a rate of 2.3xG.
Additionally, for all the struggles going forward England have been pretty watertight defensively, conceding a total expected goals against rate of 1.1xGA, the lowest in the entire tournament. Slovakia's, by comparison, is nearly four times that rate, currently at 4.3xGA.
England have match winners all over the park so while they may not deliver the scintillating performance we expect from them, they should have enough to come through this one. England 2-0 Slovakia.