There is a postponed match between Atletico Madrid vs Sevilla today, yes it's a match that should have happened in week 4. I can't count on Sevilla in this match, because this season they are very worrying, in La Liga they are struggling to rise and in the Champions League they have to go home early without even winning 1 victory.
It looks like Atletico Madrid will be able to comfortably win this match, and they can restore their last 2 matches that ended without a win. Sevilla is a very good opportunity for Atletico Madrid to win, especially this is a match that will be held at their own headquarters.
The match has started already and it's in the 18mins with both team playing 0-0. Just like you have said, Atletici Madrid should secure a win here as they are playing with a weaker team.