The end of the Champions League group stage is closing in, and on Tuesday the likes of Tottenham, Inter, Paris Saint-Germain and Liverpool will learn their fate.
Most eyes will be on groups B and C, with several European giants at risk of being eliminated before the knockout phase.
Liverpool hosts Napoli, with both sides - as well as PSG, which faces Red Star Belgrade - still able to go through from Group C, while Spurs travel to already-qualified Barcelona.
Mauricio Pochettino's Tottenham needs to match the result Inter manages at home to PSV Eindhoven, meaning either Spurs or the Serie A side will drop down to the Europa League at the turn of the year.
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Below, we examine the key data from Tuesday's matches...
Schalke v Lokomotiv Moscow
8 - Schalke has not lost any of its last eight European home games (W5 D3 L0) – it last went longer without a home defeat in a continental competition between June 2003 and November 2004 (11 games).
9 - Lokomotiv is winless in its last nine away Champions League matches (D2 L7), losing each of its last four.
Galatasaray v Porto
3 - Galatasaray will be looking to keep three successive clean sheets at home in the Champions League within a single season for the first time since October 2001.
100 - Porto goalkeeper Iker Casillas has won 99 Champions League games – victory here will see him become the second player to reach 100 victories in the competition, after his former Real Madrid team-mate Cristiano Ronaldo.
Barcelona v Tottenham
30 - Since the start of the 1976-77 season, Barcelona has lost just one of its 30 European home matches against English clubs; this coming against Liverpool in February 2007 (1-2).
22 - Barca's Lionel Messi has scored 22 goals against English clubs in the Champions League; 10 more than any other player (Ronaldo on 12).
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Inter v PSV
2 - Inter has lost two of its last five Champions League home group stage games (W2 D1), as many as it had in its previous 21 in San Siro (W15 D4 L2).
3 - Luuk de Jong has scored each of PSV's last three Champions League goals. The only players to get four consecutive goals for the Dutch side in the competition were Danny Koevermans in 2008 and Ruud van Nistelrooy ten years earlier.
Club Brugge v Atletico Madrid
47 - Atletico has kept a clean sheet in 47 per cent of its Champions League games (38/81). That is the best ratio of any team to have played more than 10 matches in the competition.
11 - Diego Simeone's men have faced fewer shots on target than any other Champions League side this season (11). However, they have conceded six goals, meaning they have let in the highest percentage of shots on target faced in the competition (55 per cent).
Red Star Belgrade v Paris Saint-Germain
4 - PSG is winless in four successive Champions League away games (W0 D1 L3), its worst such run on the road in the competition since October 2012 (10 games in a row).
3 - Neymar scored a hat-trick in the home game against Red Star earlier this season – the only player to have scored two trebles against a single opponent in the same Champions League season was Luiz Adriano for Shakhtar Donetsk BATE in 2014-15.
Liverpool v Napoli
18 - Liverpool is unbeaten in 18 successive European matches at Anfield (W13 D5 L0), last losing at home in Europe back in October 2014 against Real Madrid (0-3).
8 - Mohamed Salah has scored eight goals in eight Champions League matches as a Liverpool player at Anfield – only Steven Gerrard (14) has netted more at home for the Reds in the competition than the Egyptian.
Monaco v Borussia Dortmund
6 - Monaco has lost six successive European home matches, scoring only three goals and conceding 17 in this period. Before this run, it had never previously lost more than two continental home games in succession.
2 - Should Monaco fail to win, it will be the first team to fail to win a single group stage game in two consecutive seasons of the Champions League since Dinamo Zagreb in 2011-12 and 2012-13.
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