Barcelona, Manchester City and Arsenal are among the teams playing in matchday two of the UEFA Champions League, while Bayern Munich are looking to avenge their loss to Atletico Madrid in last year's semi-final.
Atletico host Bayern in arguably the match of the round in what is expected to be a particularly testing face-off, while Celtic will seek to make up for their 7-0 defeat at the hands of FC Barcelona as they take on Pep Guardiola and City for the first time.
Ludogorets v Paris Saint-Germain
This is the first competitive encounter between the Bulgarian Parva Liga champions and the Ligue 1 winners in addition to being the first meeting between and Bulgarian and French club in the Champions League.
Ludogorets have not had a large amount of success in their seven previous Champions League matches, winning only one match, drawing two and losing four with their sole victory coming at home against FC Basel in October 2014.
Although PSG are expected to win the game at Vasil Levski National Stadium in Sofia, they will need Edinson Cavani to improve his record on the road, having failed to score in the UCL since October 2014.
Arsenal v FC Basel
This is the first competitive meeting between Arsenal and Basel and although the Gunners go into the match as favourites, Basel have lost only one of their 10 Champions League matches against Premier League clubs.
Basel are also unbeaten away from home against English opposition in the Champions League with one win and four draws.
Arsenal can take some comfort in the fact that they have lost only three of their last 38 home games in the group stages of the Champions League.
Besiktas v Dynamo Kiev
Two teams with a history playing against each other in Europe, it is Kiev who hold the upper hand having beaten the Turkish Super Lig champions five times, while the Ukrainians have lost only once in their last five Champions League matches.
Besiktas have won only once in their last eight UCL games, failing to score in four, and have lost their last three home games in the competition.
Napoli v Benfica
Benfica and Napoli also share a competitive past, with the two teams playing in the first round of the 2009-2009 UEFA Cup, where the Portuguese team saw off the Serie A side with an aggregate score of 4-3 across two matches.
Having never lost a home game in European competition, Napoli do have some history on their side, boosted by the fact that Benfica have won only three of their last 17 away matches in the Champions League
Napoli will be looking to Arkadiusz Milik, who has been in strong form having scored three goals across his last three appearances in European competition.
Borussia Monchengladbach v Barcelona
The first meeting between the pair, Barcelona will be looking to improve on their recent form in Germany, having failed to win their last three matches there.
They will need to make the most of their attacking trio of Neymar, Suarez and Messi, with Monchengladbach having played 13 straight matches against Spanish opposition without a clean sheet.
Celtic v Manchester City
Despite both sides maintaining a somewhat lengthy history playing in Europe, Celtic and City are yet to meet, although the Scottish champions faced Manchester United in the group stages of the UCL in 2006-2007 and 2008-2009, winning one match, drawing another and losing two.
The game will also mark the first time that Celtic face a Pep Guardiola led team despite facing Barcelona nine times in the past, while Brendan Rodgers will have his work cut out against the Spaniard having won just one of the seven Champions League games he has managed in.
Although Kevin De Brunye is expected to miss up to three weeks due to injury, City will be hoping that Sergio Aguero can continue his form, having recorded two hat-tricks in his two appearances in Europe this season.
Atletico Madrid v Bayern Munich
Despite knocking out the Bundesliga champions in last year's Champions League semi-finals, Atletico have had a tough time finding the back of the net against Bayern, never scoring more than once in a match across their four encounters.
What has kept the Spanish side competitive has been their defence, with Diego Simeone's team having kept clean sheets in 10 of their last 12 group matches, conceding just three goals.
Although sitting on top of the Bundesliga table with five wins from five, Bayern come into this match having lost three successive Champions League games in Spain.
FC Rostov v PSV Eindhoven
Although the first time the two sides have met, Russian Premier League runners-up Rostov have taken on Dutch opposition before, defeating Ajax in the qualification phase of this season’s Champions League, beating them 5-2 on aggregate.
PSV have won just one of their last 13 Champions League games away from home, while failing to find the score in eight of those games while Rostov are unbeaten in the three European games they have played since 2000, winning one match and drawing two.