UEFA Champions League is an expanded competition in an updated format. These are the key dates for the matches in this season's tournament.

How does it work?Thirty-six sides entered into the new "league phase," and now there are 24 remaining. Eight have already gone through to the round of 16, while sides finishing 9th through 24th are headed to the first knockout round — the playoff.

After the playoff round draw of the new-look Champions League, here's how it impacts the round of 16, the format and the rest of the bracket.