I say it's very plausible. Sometimes the outcome of the matchup is logical even if individual games have surprising results. Two examples from this season. I lost the home leg of the cup matchup 1:3. I won the away match 3:2. The game probably meant to send my opponent through, but did it in an extravagant fashion. Fast forward to the CL matchup. I was up against a stronger opponent. Pulled off a 1:1 draw away. Was hopeful for the home leg, played defensively, but lost 0:3.