The UEFA Champions League knockout phase is where Europe’s biggest club competition truly comes alive. After the league phase wraps up, the tournament shifts into high-stakes, two-legged ties that ultimately decide who lifts the famous Champions League trophy.
Below is a complete breakdown of when the Champions League knockout phase starts, how it works, and the key dates for the 2025–26 season.
When Does the UEFA Champions League Knockout Phase Start?
The Champions League knockout phase begins in February 2026, following the conclusion of the league phase.
Key Knockout Phase Dates (2025–26)
Knockout Phase Play-offs
- First legs: February 17–18, 2026
- Second legs: February 24–25, 2026
This round determines which clubs advance to the Round of 16.
Champions League Round of 16 Dates
- First legs: March 10–11, 2026
- Second legs: March 17–18, 2026
From this stage onward, every matchup is a straight knockout decided by aggregate score.
Quarterfinals, Semifinals, and Final Schedule
Quarterfinals
- First legs: April 7–8, 2026
- Second legs: April 14–15, 2026
Semifinals
- First legs: April 28–29, 2026
- Second legs: May 5–6, 2026
Champions League Final
- Date: May 30, 2026
- Venue: Puskás Aréna, Budapest, Hungary
How the Champions League Knockout Phase Works
- All rounds except the final are played over two legs
- Teams advance based on aggregate score
- Away goals are not used as a tiebreaker
- Extra time and penalties are played if teams are level after two legs
The final is contested as a single match at a neutral venue.
Why the Knockout Phase Matters
The knockout phase is when the Champions League reaches its peak. It produces dramatic comebacks, classic European nights, and the moments that define a club’s legacy in continental football.
Quick Summary: Champions League Knockout Phase 2025–26
- Starts: February 17, 2026
- Round of 16: March 2026
- Quarterfinals: April 2026
- Semifinals: Late April to early May 2026
- Final: May 30, 2026 in Budapest