With two matches left to play in the Champions League group stages, some of the 32 participating clubs are already preparing for the knockout round, more are hoping to join them soon, and others have set their sights considerably lower.
Here's the state of play heading into matchday five.
Already qualified for the round of 16
Atletico Madrid are the only side with a 100% record in the group stage after four matches, despite featuring in a pool which also contains five-time European champions Bayern Munich.
The Bavarians' coach, Carlo Ancelotti, will not be too concerned though, as his side are also assured of a last-16 place having accrued 10 points from four matches.
Also through are the top two in Group A - Arsenal and Paris Saint-Germain - and Group F leaders Borussia Dortmund.
Can qualify this week
Manchester City and Leicester City are among the sides who can book passage to the knock-out stage on matchday five, and Spanish giants Barcelona and Real Madrid could too, with trips to Lisbon and Glasgow respectively.
Other sides who could secure a place this week are Benfica, Napoli, Besiktas, Bayer Leverkusen, Porto, Sevilla and Juventus.
Still in contention
Tottenham and Celtic still have a chance of reaching the last 16, but they will not be able to secure a place until the final round of group games.
In the same situation are Borussia Monchengladbach, CSKA Moscow, Sporting Lisbon, Copenhagen, Lyon and Dynamo Kiev.
Cannot qualify but could reach the Europa League
For some sides the best that can be hoped for is a place in the last 32 of Europe's second-tier club competition, the Europa League. The teams in this bracket are Ludogorets, Basel, PSV Eindhoven, Rostov, Club Brugge, Dinamo Zagreb and Legia Warsaw.