By OkayGoal 
Paris Saint-Germain will face AS Monaco in the UEFA Champions League’s play-off round this evening.
The French rivals meet in European competition for the first time, while it’s only the third all-Ligue 1 knockout tie in Champions League history.
The first saw Lyon beat Bordeaux in the 2009-10 quarter-finals, while last season, PSG thrashed Brest 10-0 over two legs. That convincing win is the biggest-ever winning margin in a two-legged tie between teams from the same country.
In total, there have been 27 two-legged Champions League knockout ties involving teams from the same country. English clashes have been the most common, with 10, followed by all-Spanish ties (8).
There have been three different same city knockout ties, with Inter Milan and AC Milan facing off on three occasions, and three two-legged ties between Atletico Madrid and Real Madrid.
The 2003-04 quarter-final between Chelsea and Arsenal provided the first-ever London derby in the Champions League.
Every same-nation Champions League knockout tie (excluding finals)
All scores are aggregate score after two legs
- Bayern 0-1 Dortmund (1997/98 quarter-finals)
- Bayern 6-0 Kaiserslauten (1998/99 quarter-finals)
- Valencia 5-3 Barcelona (1999/2000 semi-finals)
- Barcelona 1-3 Real Madrid (2001/02 semi-finals)
- Milan 1-1 Inter (2002/03 semi-finals, Milan won on away goals)
- Chelsea 3-2 Arsenal (2003/04 quarter-finals)
- Milan 5-0 Inter (2004/05 quarter-finals)
- Chelsea 0-1 Liverpool (2004/05 quarter-finals)
- Chelsea 1-1 Liverpool (2006/07 semi-finals, Liverpool won 4-1 on penalties)
- Arsenal 3-5 Liverpool (2007/08 quarter-finals)
- Liverpool 3-4 Chelsea (2007/08 semi-finals)
- Liverpool 5-7 Chelsea (2008/09 quarter-finals)
- Man United 4-1 Arsenal (2008/09 semi-finals)
- Lyon 3-2 Bordeaux (2009/10 quarter-finals)
- Chelsea 1-3 Man United (2010/11 quarter-finals)
- Real Madrid 1-3 Barcelona (2010/11 semi-finals)
- Barcelona 1-2 Atleti (2013/14 quarter-finals)
- Atleti 0-1 Real Madrid (2014/15 quarter-finals)
- Barcelona 2-3 Atleti (2015/16 quarter-finals)
- Real Madrid 4-2 Atleti (2016/17 semi-finals)
- Liverpool 5-1 Man City (2017/18 quarter-finals)
- Spurs 4-4 Man City (2018/19 quarter-finals, Spurs won on away goals)
- Milan 2-1 Napoli (2022/23 quarter-finals)
- Milan 0-3 Inter (2022/23 semi-finals)
- Brest 0-10 Paris (2024/25 knockout phase play-offs)
- Real Madrid 2-2 Atleti (2024/25 round of 16, Real Madrid won 4-2 on penalties)
- Bayern 5-0 Leverkusen (2024/25 round of 16)
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