The top two teams in each group go directly to the European Championship in Germany.
In addition, there are four places that are distributed in the playoffs, but the play-off places are awarded to teams that did well in the Nations League - and since Sweden was last in their Nations League group last time, that hope does not live.
Peer meetings important
Sweden are currently third in the group, with four points up on Belgium and Austria – who meet in the next round (October 13). With the two teams meeting then, Sweden can – if they win tonight – overtake either team already at the next gathering in October (when Sweden meets Belgium).
In UEFA competitions, head-to-head meetings take precedence over goal difference. Therefore, Sweden most likely needs to win against Austria tonight, and since Austria won 2-0 at home against Janne Andersson's national team, (depending on future results) a win of 2-0 or (even better) more, may be needed.
Other results may come into play
If Sweden loses to Austria tonight, is it over? No, not theoretically. But then Belgium or Austria will have to lose all their remaining matches, which is unlikely.
What about a draw? No, even then it is not completely. But then Austria must lose to Belgium and drop points in at least one more game – while Sweden wins another game.
What if Sweden wins tonight? Then Sweden goes to the European Championship if there is a blue and yellow victory in the three remaining games. Even a draw can then be enough for Sweden's European Championship advancement, if Belgium or Austria lose points in any further match while Sweden wins all remaining matches.