Who plays who in Champions League quarter-finals?

Aston Villa will play Paris St-Germain and Arsenal will face Real Madrid in the quarter-finals of the Champions League.

Unai Emery’s current and former clubs cruised through on Wednesday with home second-leg wins.

Villa beat Club Brugge 3-0 to secure a 6-1 aggregate win, with Arsenal’s 2-2 draw with PSV giving Mikel Arteta’s side a 9-3 two-legged victory.

Paris St-Germain beat Premier League leaders Liverpool on penalties on Tuesday after a 1-1 aggregate draw.

Real Madrid edged Atletico on penalties to knock them out of the Champions League for the fifth time in 11 years.

The other quarter-final ties see Inter Milan play Bayern Munich and Borussia Dortmund face Barcelona.

Barcelona beat Benfica 4-1 on aggregate

Bayern Munich beat Bayer Leverkusen 5-0 on aggregate

Inter Milan beat Feyenoord 4-1 on aggregate

Paris St-Germain beat Liverpool on penalties after 1-1 aggregate draw

Borussia Dortmund beat Lille 3-2 on aggregate

Aston Villa beat Club Brugge 6-1 on aggregate

Real Madrid beat Atletico Madrid on penalties after 2-2 aggregate draw

Liverpool suffered their first setback under manager Arne Slot after they were beaten 4-1 on penalties by PSG at Anfield.

The French champions had looked to be heading out of the competition in the league phase before a late run of form saw them finish 15th in the standings, and now they are hitting their stride when it matters most.

PSG will face 1982 European champions Aston Villa in the quarter-finals in April.

It is Villa’s first European Cup or Champions League quarter-final since 1983.

Fellow English Premier League side Arsenal were effectively through after they thrashed PSV 7-1 in the first leg. The second leg ended 2-2.

Arsenal and Aston Villa would meet in the semi-finals, if they both won their quarter-final ties.

The first legs of the quarter-finals take place on 8 and 9 April, with the second legs taking place one week later.

Yes.

Barcelona and Real Madrid have never met in a Champions League final or European Cup final before.

But, being on the opposite sides of the draw, they would meet in the final if they came through their quarter-final and semi-final ties.

Each country’s league earns a coefficient ranking based on how their teams perform in Uefa’s three men’s club competitions: the Champions League, Europa League and Conference League.

Coefficient points are earned through match results – two for a win and one for a draw.

The points earned by clubs from the same domestic league are added up and divided by the number of clubs the league has in Europe.

For example, if the Premier League had 100 points, that would be split by the number of teams playing in Europe (seven), giving England a coefficient of 14.28.

This season, bonus points are available to clubs playing in the Champions League, which is advantageous to leagues with more clubs competing in it, such as Germany and Italy.

Countries that finish in the coefficient table’s top two earn an additional Champions League spot for the following season.

Those spots are awarded to the teams who finish in the first position below the standard Champions League allocation in those leagues.

In the Premier League, the top four clubs automatically qualify for the Champions League via league position, so any additional place would go to the team in fifth.

England are top of the coefficient table, despite Liverpool following Manchester City in exiting the Champions League.

Italy are second but endured a dismal time in February with AC Milan, Atalanta and Juventus all losing in the knockout play-off round – limiting Serie A’s opportunity to gather more points.

Spain are third in the rankings, but Germany’s prospects appear difficult with Bayern Munich and Dortmund in the same half of the Champions League draw.

England could end up with seven Champions League teams next season.

The winners of the Europa League, as well as the Champions League, are granted a spot.

Under previous rules, any single league could only have a maximum of five clubs in the Champions League. However, that rule has been scrapped.

This season, any team who win the Europa League or Champions League but do not qualify for the Champions League via their domestic league position will go into the Champions League.

Watch highlights of every Champions League game from 22: 00 on Wednesday on BBC iPlayer and the BBC Sport website and app.