== Format ==
TheBabak knockoutgugur phasediikuti involvesoleh theenam sixteenbelas teamsklub whoyang finishedlolos in the top two in each of their groups in thedari [[2011–12Babak UEFAgrup Liga Champions LeagueUEFA group stage2011–12|groupbabak stagegrup]].<ref name="regulations">{{cite web| url = http://www.uefa.com/MultimediaFiles/Download/Regulations/competitions/Regulations/01/63/02/44/1630244_DOWNLOAD.pdf | title = Regulations of the UEFA Champions League 2011/12 | month = March | year = 2011 | publisher = UEFA | location = Nyon | format = PDF | accessdate =1 June 2011}}</ref>
Selain pertadingan final, setiap babak memainkan sepasang pertandingan kandang-tandang. Hasil dari kedua pertandingan akan dijumlah kan untuk menentukan hasilnya. Jika terjadi hasil imbang, maka ditentukan dari jumlah gol tandang, dimana klub yang mampu mencetak gol lebih banyak saat bermain di kandang lawan menjadi pemenangnya. Jika masih imbang, maka pertandingan kedua dilanjutkan dengan [[perpanjangan waktu]], dalam dua babak masing-masing 15 menit. Jika kedua klub mencetak gol pada masa perpanjangan waktu sehingga hasilnya imbang, maka klub tandanglah yang menjadi pemenang. Jika tidak terjadi gol maka pemenang ditentukan dengan [[adu penalti]].
Each tie in the [[single-elimination tournament|knockout phase]], apart from the final, is played over [[two-legged tie|two legs]], with each team playing one leg at home. The team that has the higher aggregate score over the two legs progresses to the next round. In the event that aggregate scores finish level, the [[away goals rule]] is applied, i.e. the team that scored more goals away from home over the two legs progresses. If away goals are also equal, then thirty minutes of [[extra time (association football)|extra time]] are played, divided into two fifteen-minutes halves. The away goals rule is again applied after extra time, i.e. if there are goals scored during extra time and the aggregate score is still level, the visiting team qualifies by virtue of more away goals scored. If no goals are scored during extra time, the tie is decided by [[penalty shootout (association football)|penalty shootout]]. In the final, the tie is played as a single match. If scores are level at the end of normal time in the final, extra time is played, followed by penalties if scores remain tied.
Pada pertandingan final hanya akan melakukan satu pertandingan di tempat yang telah ditentukan sebelumnya, untuk final kali ini akan diselenggarakan di [[Allianz Arena]] di [[München]], Jerman. Jika skor imbang maka dilanjutkan dengan perpanjangan waktu, dan adu penalti jika masih imbang.
In the draw for the round of 16, the eight group winners are seeded, and the eight group runners-up are unseeded. A seeded team is drawn against an unseeded team, with the seeded team hosting the second leg. Teams from the same group or the same association cannot be drawn against each other. In the draws for the quarter-finals onwards, there are no seedings, and teams from the same group or the same association may be drawn with each other.
Untuk pengundian babak 16 besar, delapan juara grup menjadi unggulan sedangkan runner up grup masuk bagian non-unggulan. Setiap klub unggulan akan bertanding melawan non-unggulan, dimana tim unggulan akan menjalani pertandingan kandang pada pertadningan kedua. Klub dari grup yang sama, atau asosiasi yang sama tidak akan dipertemukan. Untuk pengundian babak perempatfinal dan seterusnya dilakukan secara acak sepenuhnya tanpa ada batasan.
== Qualified teams ==
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