I gotta say that Atletico playing at home against 10 men Qarabag for an extend period of time takes the cake as the most shocking result. I didn't watch he Olympiacos - Barcelona (0-0) and Borussia - APOEL (1-1) games, but from the stats they appear to be those games where a team has a ton of chances but they just can't convert. So these games are surprising because of the final result, but not much in terms of how the teams played over the 90+ minutes.
I'll let someone else talk about the Chelsea game, and I'll just give my opinion on Tottenham's game. The result isn't really surprising to me because I kind of expected a defeat with how we've been playing lately and because of how well Tottenham did against Madrid at the Bernabeu. What's most surprising to me about this game is how bad Madrid were made out to look by Tottenham all game long. It's been said that the champions league brings out the best of Madrid or that big games like this one are when Madrid performs best. Yesterday I saw none of that. There wasn't a single moment when Tottenham didn't look dangerous or when it looked like Madrid had the edge. Madrid was either getting dominated or lacking ideas about how to break down Tottenham's defense. It was a 3-1 result at the end, but probably a 4-0 would have been a more fitting result.
So what is in your opinion, the most suprising results of CL week 4? Atletico or BVB second draw against a team they should have beaten at home? Real Madrid defeat at the hand of Tottenham? Roma 3-0 win against Chelsea? Shaktar second victory against Feyenoord giving them 6 point over Napoli? The fact two of last year semi-finalist (Atletico and Monaco) propably won't even make it to the knockout phase? Anyway, share your most suprising results and why you didn't expect it.