I wonder why not more people are looking to teams like Lazio. They had some bad games too, but still look far more stable than Manchester United in my opinion.
They are one of the favorites for sure.
Lazio and Athletic Bilbao are two of the strongest teams in the league. Manchester United and Tottenham didn't perform like them. In the end it's still in group stage so don't come to conclusions easily. As long as they advance to quarter final there will be no problem.