Porto and Shakthar will appear all out in their last match, because the results of the match will determine whether they will qualify for the last 16 or not. For Porto maybe a draw is enough to bring them to the knockout round, but still if they play it safe then the risk is also very large, because it is certain that Shakthar will appear all out. As for Shakhtar, victory is the only way they can get 1 ticket to the last 16.
The problem for them is that they will play as a guest team, and when their first meeting also lost to Porto, of course this will be even more difficult.
Shakhtar's main problem in this match is that it will be the away team and its fans will not be able to support it as it deserves. Although Porto is a strong competitor, it is not difficult for Shakhtar to achieve victory given the excellence of its players in decisive matches.
Recent
analysis of historical statistic data, including recent performances and player stats up, suggested the most likely outcome of this match was a Porto win with a probability of 56.3%. Still this prediction gives 43.7% to Shakhtar which is not that bad at all.
Although I am confident that Shakhtar-Donetsk is able to extract a profit from Porto, I am still hesitant between betting on Shakhtar or settling for a draw.