Results:-
Benfica 3 - 1 Newcastle
Chelsea 3 - 1 Rubin Kazan
Fenerbache 1 - 0 Lazio
Spurs 2 - 2 Basel
I still think Newcy have a decent chance to go through, however the must score the first goal in the 2nd leg or its good bye to them. Chelsea just need an away goal and they'd be 99% through. Spurs-Basel is a tough one to call because even though Basle are strong at home, Spurs have the pace and counter attacking ability to hit them. Even with Bale's injury they have the weapons to score in Basle. Although I'd give Basle the slight edge 55-45. As for Lazio and Fenerbache, I expect Lazio to win the 2nd leg and should go through, but you never know.
As things stand I'd say Benfica, Chelsea, Lazio are probably going to the semis with the other game to close to call (Yes even though Lazio lost the first leg I fancy their chances to reaching the semis higher than Basel or Spurs).
I actually fancy Chelsea to win the whole thing. I'd like to see a Chelsea-Lazio final.