Man United, RB Leipzig, Real Sociedad most impacted clubs as major European leagues struggle to resume

As for Barcelona and Madrid, they're separated by two points at the top, but there's not much fixture intrigue, as they have the second-easiest and easiest remaining schedules, respectively. Eighteenth-place Mallorca are just one point from safety, except that might just provide some false hope: They still have Sevilla, Atletico, Madrid and Barcelona left on the docket.

German Bundesliga: RB Leipzig

If someone was/is going to end Bayern Munich's seven-year reign atop the Bundesliga table this season, the challenge was/is slightly more likely to come from the team currently in third, rather than the one in second.

Julian Nagelsmann's Leipzig have the second-best expected-goal differential in Germany this season, 21st Club rates them as the seventh-best team on the planet, and they have a relative cakewalk of a schedule remaining. Leipzig have the second-easiest set of fixtures still to play: More than half of their remaining matches are at home, two-thirds are against teams in the bottom half of the table and they play only one more game (home against Dortmund) against any of the Bundesliga's top seven. Plus, the two teams ahead of Leipzig have two of the league's tougher schedules: fifth-toughest for Bayern and seventh-toughest for Dortmund.

The window is open for Leipzig, but the five-point gap to first still ultimately makes a title run unlikely.

"Both Bayern and Dortmund have relatively tricky run-ins for the remainder of the season," Swoboda said. "But Bayern's lead and their higher quality -- we rate them as the best team in the world right now -- means that we give them an overwhelming chance of lifting the title should the season resume as planned."

Bayern, then, might be the unluckiest team in terms of the Champions League. They had all but assured safe passage to the quarterfinals with a first-leg demolition of Chelsea in the round of 16, while 21st Club's third-rated team in the world (Liverpool) were already eliminated, and the No. 6 side (Real Madrid) was on the verge of joining them. Had the tournament preceded as planned, Bayern likely would've been favorites to win it all.

Serie A: Everyone in the Relegation Fight

What a weird season. Atalanta -- who are currently in fourth in the table, 15 points back of first-place Juve -- have the best xG differential in the league by far. Per 21st Club's ratings, Serie A has four teams in the top 20 of the world, but none of them are in the top 10. In addition to their WSL rank, each team is given a specific rating. Manchester City, for example, are at 945. The gap in the WSL ratings between Juventus (highest-rated Serie A side) and Lazio (fourth) is smaller than the gap between the first- and fourth-best teams in the world: Bayern and Barcelona.

Put another way: Everyone in Italy's top four is worse than Manchester United but better than Arsenal.

Italy has a bunch of good teams, no great teams and just a single point separating first and second, which typically might make for a more interesting and more difficult-to-project run-in.

"Juventus and Lazio are neck-and-neck both in terms of points but also in difficulty of games remaining," Swoboda said. "Our prediction model gives Juventus a slight edge in the title race."

Inter Milan have a really easy run-in -- seven matches at home, seven matches against teams in the bottom half -- but that is mainly because their past two matches were against Lazio and Juve. They lost both and fell nine points back of first.

You might expect good teams to have easier schedules and bad teams to have harder schedules, since they can't, you know, play themselves, but that's not the case in Italy. The easiest schedule belongs to 17th-place Genoa, who are tied on points with 18th-place Lecce, who have the third-easiest remaining fixtures. In 19th, SPAL are seven points back of safety, but they also have the second-easiest run-in. Hell, even last-place Brescia have a slightly easier-than-average schedule still to play.

Meanwhile, even though Udinese are in 14th, three points clear of relegation, they still have to play Atalanta, Lazio and Juventus. If Serie A can return, expect a real Royal Rumble at the bottom.

Ligue 1: Lille (though the season's been decided)

This one has already been decided, as the French government shocked Ligue 1 by saying that there would be no professional soccer in the country until September. Ligue 1 opted to award the final-table standings based on points per game.

Amiens, who were four points from safety when the decision was made, have created a petition to "demand justice" and review Ligue 1's decision. While they had the fourth-easiest remaining schedule in the league, 21st Club rates Amiens as the third-worst team in all of the Big Five leagues.

Lyon -- who finished seventh, one point back of the final Europa League spot -- are seeking millions of dollars in damages. They had the second-best goal differential in the league, they're the second-best French side, according to 21st Club, and they also have the fifth-easiest remaining schedule. However, the team most affected by the sudden cessation of the season is Lille.

They finished one point back of third-place Rennes for the final Champions League spot. The teams are rated as roughly equivalent by the 21st Club system, and Rennes still had the fifth-toughest remaining schedule, including games at home against Lyon and away to PSG, which is every French team's hardest fixture of the season. Lille, on the other hand, had the third-easiest remaining schedule, and they'd already taken four points from their two matches against Rennes.

And so, Christophe Galtier's side becomes the most prominent example of something that's only going to become more obvious over the next weeks and months: No matter how each league decides to end its season, the outcome is never going to be totally fair.