Sociedad-United is a tricky draw as well, I feel sorry for Sociedad. They are playing well this season and I considered them a dark horse of the competition but United really is a tough opponent, especially so early in the competition.
Dinamo has a real chance against Krasnodar and I expect them to go through. Lucky draw, one of the worst teams in the competition.
Arsenal from some previous year would be the favorite but not this Arsenal.
Dinamo certainly has a better chance against Krasnodar than against Benfica 2 years ago but it is a completely uncertain match.
Krasnodar is still a much stronger team than CSKA with which Dinamo played in the EL group.