These are good predictions with I have to be agreed with six without any doubt but here I am feeling two matches are going to be not easy because these teams are on level and also having good current performance level like Sporting vs Atlanta both are on good level and most chances we will have this match going to be ended on penalties because Atlanta is also on good run and their current performance level is also at the top.
Marseille vs Villarreal is also going to be tough match here I am favouring Marseille because as they perform against Ukrainian side with this level of performance they can beat Villarreal as well which is currently in bad shape and their performance level in La Liga is not good Marseille is also having problems but their fightback against Shakhtar was impressive which give them good advantage.
Even though I've made my predictions, I'm not 100% sure hahaha, I also have a lot of doubts
I believe that only Liverpool and Leverkusen have an absurd advantage over their opponents and that only a surprising result can take them out of the competition
Those two games you mentioned Sporting vs Atlanta and Marseille vs Villarreal will be very difficult, I need to see the odds because I haven't seen them yet, but I don't know if I'll bet on a simple win or on qualification
Maybe I'll bet on goals, which I don't usually do, but it might be more advantageous than trying to get the team to qualify or a victory
Here is the current odds for those matches above
Marseille @2.08
Villarreal @3.55
And for the match Sporting vs Atalanta
Sporting @2.21
Atalanta @3.20
For the first leg match you can see Marseille and Sporting as the favourite but although Sporting is the favourite but i don't think they can easily to beat Atalanta and talking about Sporting vs Atalanta i think this is interesting because both teams has been met at group stages and this season they are in the same group and after group stages ended Atalanta can able to finish at first place and Sporting in the second place and Atalanta records is very impressive because they can collect 14 points from 6 matches and still unbeatable
And from the meeting records too we can see Atalanta has good records from Sporting because during group stages Atalanta can gets 1 win and 1 draw from 2 matches against Sporting besides that Atalanta recent performance also quite stable in this competition and Serie A so my prediction is although first leg will be held at Sporting home ground but Atalanta will not lost and possible they can beat Sporting or at least gets draw result from this match and for betting option i will be more prefer to pick Atalanta win or for safe bets both teams to scores