Premier League clubs participating in Europe face ultra-congested fixture lists in the New Year should they fail to finish in the top eight of their respective league phases, with some facing the prospect of nine games in a 29-day period.
In the Champions League, Arsenal sit at the top of the table after six games, with Manchester City in fourth.
If they finish in the top eight, and Arsenal's progress is all-but secured, both clubs would play two games in Europe's elite competition between now and March as a result of automatically progressing to the knockout stages - giving them two much-needed weeks off.
But Chelsea, Newcastle United, Tottenham Hotspur and Liverpool make up the other English teams in the Champions League and sit outside of the top eight with two rounds of matches remaining.
All three clubs are situated in the top 24 of the table, meaning they would play in the two-legged knockout play-offs in February to secure a spot in the next stage.
There's no respite in Europe's other competitions either. The schedule is the same for both the Europa League and Conference League, despite two fewer group games in the latter.
Aston Villa sit third in the Europa League standings, with Nottingham Forest 11th and currently in line for one of those play-off double headers. So too Crystal Palace, who are ninth in the Conference League group phase.
The first leg in the knockouts will be played in the midweek of February 17-19, with the return fixtures on February 24-26.
These two additional games come at a frantic time for English clubs, with the FA Cup fifth round scheduled in the week of the first leg and Premier League fixtures also included.
The first leg of the round of 16 is set to take place on March 10-12 with the second leg on March 17-19.
Clubs finishing outside the top eight would play four Champions League games between now and March, while those breaking into automatic qualification spots will only play two.
Manchester City, Newcastle, Arsenal and Chelsea also remain in the Carabao Cup and if they progress past the quarter-finals, which all four could as they do not face each other, the second leg of the semi-final would be played in the week commencing February 2.
The additional Champions League fixtures - alongside Premier League and Carabao Cup games - in February mean that those participating in the play-offs could play a total of nine fixtures across a 29-day period, while those sides already out of the League Cup may face eight games in that time.
*Fixtures marked with an asterisk are only applicable if teams finish from ninth to 24th in their respective European league phase to secure a place in the knock-out play-offs, or progress to the FA Cup fourth round or the semi-finals of the Carabao Cup.
