Dortmund look the stronger proposition at Signal Iduna Park. They have started the Bundesliga season with two wins and have an excellent recent home record in Europe, while Villarreal arrive without a win in their opening four league matches. Dortmund also beat Villarreal 4–0 at home in their previous Champions League meeting.
However, Dortmund's defensive absences — particularly Nico Schlotterbeck and Emre Can — provide Villarreal with an opportunity, while the visitors have enough attacking quality through players such as Gerard Moreno, Georges Mikautadze and Nicolas Pépé to cause problems.
That makes 2–1 preferable to a more comfortable Dortmund victory: the home side should create enough chances to win, but Villarreal have a realistic route to scoring. 🎯 CORRECT SCORE: 2–1

Porto come into this in outstanding domestic form, having won their opening six matches and conceded just once. Their home record in Europe also makes this a much tougher assignment for City than the odds might suggest.
However, Manchester City have started strongly under Enzo Maresca and possess significantly greater attacking depth. Erling Haaland has already scored in each of City's last two matches, while City's previous four competitive meetings with Porto have produced three wins and a draw.
Porto's defensive absences and City's superior attacking quality could ultimately prove decisive. I expect Porto to make this competitive and potentially score, but City should create enough chances to edge what could be a tight, high-quality Champions League encounter. 🎯 CORRECT SCORE: 1–2