We are too busy talking about group F and forget that group H is also an interesting group. As we know, Barcelona lost against Shakhtar and that also dashed Barcelona's hopes of qualifying for the round of 16 early. Now Barcelona and Porto have the same 9 points and this will be an exciting competition considering that anyone can win the group with two matches remaining.
However, that's actually not the main point, but Shakhtar, who currently has 6 points, could shift one of the places at the top of Group H because they will play Antwerp (who obviously didn't qualify) and they will definitely get 3 additional points. After that Shakstar will play Porto in the last match and if they do well then Shakstar will collect 12 points. Barcelona and Porto must be careful if they don't want to lose their current place.
Thus, Shakhtar have had greater luck in their last two matches, of course, as you mentioned, Barcelona and Porto must be fully alert. Barcelona and Porto will face each other on matchday 5. If the two draw, Shakhtar will be very fortunate to narrow the points gap. I was quite surprised by the previous defeat of Xavi's squad, perhaps many of us lost their bets in that match, and their progress in qualifying for the round of 16 was delayed.
Barcelona, Porto and Shakhtar have made Antwerp their point barn, and even the remaining two matches in the future will be exploited again to smooth the steps of the three clubs. However, it could be that Antwerp becomes a stumbling block because it is too underestimated, and will make Shakhtar and Barcelona cry a little, because at UCL surprises often occur and are difficult to understand.