Borussia Dortmund coach Jurgen Klopp does not know what effect Marseille's sacking of Elie Baup will have on the sides' fixture.
The UEFA Champions League Group F rivals meet at the Stade Velodrome on Wednesday, with the Ligue 1 outfit having dismissed Baup on Saturday following defeat to Nantes a day earlier.
Sporting director Jose Anigo has taken interim charge at the club as Marseille look to avoid finishing the group without a win, while victory would take Dortmund into the next stage.
A draw would prove sufficient if Napoli fail to beat Arsenal but Klopp is unsure whether Baup's departure will help or hinder Marseille.
"It could go either way," he said. "Obviously, there could be the classic scenario after a coach change. It's always better to play against a team before they change their coach than after they change their coach..
"My colleague won't be able to change that much in such a short space of time. I heard about the speech given by the club's president today (Tuesday), (it) seems like he'd been having a bad time watching from the stands, he told the team he wasn't happy with what he'd seen."
The reverse fixture between the sides saw Dortmund run out comfortable 3-0 winners, thanks to a Robert Lewandowski brace and a third from Marco Reus.
However, Klopp, who saw Nuri Sahin and Sven Bender pick up injuries in Saturday's defeat to Bayer Leverkusen, believes Marseille will put up stern resistance on home soil.
"They will fight, really fight. They aren't youur typical 'bottom of the group' side, as they played well in every single game," he added.
"They (are) never, never completely beaten. Not in our stadium, not in their last game against Arsenal and that's why it'll be a tough game.
"The fact that they have changed their coach is the smallest issue here."
|17||D. Payet||32' 34'|
|Coach: J. Anigo|
for Lucas Mendes 46'
for S. Khalifa 55'
for F. Thauvin 79'
|Ligue 1 Review: Title chasers´ slip-ups go unpunished|
|La Liga Review: Real and Atletico suffer frustrating draws|
|Primeira Liga Review: Porto´s Tello dents Sporting´s title hopes|
|Monaco 0 PSG 0: Champions miss chance to go top|
|Real Madrid 1 Villarreal 1: Moreno leveller ensures stalemate|
|Simeone satisfied with Sevilla point|
|Henry: Chelsea can win a trophy treble this season|
|Mancini frustrated by ´hesitant´ Inter|
|Sevilla 0 Atletico Madrid 0: Simeone´s men in fiery draw|
|Pochettino upbeat despite League Cup defeat|
|Inter 0 Fiorentina 1: Montella´s men end San Siro wait|
|Bundesliga Review: Wolfsburg edge eight-goal thriller, Monchengladbach win|
|Mourinho revels in ´beautiful´ League Cup success|
|Eredivisie Review: PSV lose home record as Ajax close the gap|
|Terry thrilled by ´massive´ League Cup final win|
|Chelsea 2 Tottenham 0: Mourinho´s men seal League Cup success|
|Coquelin sustains broken nose|
|Wenger hails Giroud character after Everton goal|
|Everton not getting what they deserve - Martinez|
|Coutinho is coming of age at Anfield - Rodgers|
|Football League Preview: Wolves in the hunt for back-to-back promotions|
|Norwich City 2 Ipswich Town 0: Neil´s men go third with derby triumph|
|Southampton v Crystal Palace: Fonte focusing on big picture|
|Arsenal 2 Everton 0: Giroud strikes to silence doubters|
|Dynamo Dresden v Borussia Dortmund: Hummels eager to build on derby win|
|Rodgers tips hat to relentless Liverpool|
|City facing uphill challenge to retain title - Pellegrini|
|Celtic 4 Aberdeen 0: Champions dominate top-of-the-table clash|
|Lallana hails ´massive´ win as Liverpool´s top-four charge continues|
|Hull City v Sunderland: Cattermole allowing no excuses against ´bogey team´|
|Liverpool 2 Manchester City 1: Coutinho dents City´s title hopes|
|Sunderland to appeal Brown red card|
|Aston Villa v West Brom: Sherwood looking for confidence boost|
|Allegri not taking risks on Vidal and Pogba|
|Pardew defends Jedinak over Sakho elbow|
|Heldt apologises after Schalke´s derby humbling|
|Milan must give that bit extra - Bocchetti|
|Rooney: Brown red must be rescinded|
|Monk hails Swansea´s versatility|
|Melbourne Victory 2 Wellington Phoenix 3: Hosts miss chance to go top|
|Rodgers: Top-four finish would be bigger than last season´s effort|
|Batman and Robin ´a bit of fun´ - Reus|
|Rakitic feeling better after ending goal drought|
|Copa Libertadores Preview: Well-rested Cruzeiro ready for Universitario|
|Fournier fuming after Lyon loss|
|DFB Pokal Preview: Gladbach visit rusty Offenbach|
|Mourinho: Tottenham approached me|
|Primeira Liga Review: Birthday boys Benfica hit Estoril for six|
|Inzaghi finds positives in lacklustre display|
|Eredivisie Review: AZ move third, Propper fires Vitesse to victory|
|Chievo 0 Milan 0: Pressure back on Inzaghi|
|Bundesliga Review: Derby win for Dortmund superheroes, Leverkusen go fourth|
|Ligue 1 Review: Lyon loss leaves door open for PSG|
|Bueno nets perfect hat-trick in four-goal spree for Rayo|
|Carver impressed with Newcastle´s fighting spirit|
|Van Gaal explains Di Maria decision|
|Luis Enrique angered by Granada pitch|
|Sherwood confident of Villa survival|
|Referee East says ´no mistaken identity´ as Poyet pledges to look again|
|League One Review: Robertson and Johnson off to winning starts, Bristol City go eight clear|
|Bruce angered by missed decision|
|Berahino can be ´top class´ - Pulis|
|Grateful Gutierrez thanks ´special´ fans|
|Monk targets Swansea points record|
|Klopp´s ´perfect´ afternoon|
|Victory soured by Ireland injury, says Hughes|
|Championship Review: Middlesbrough´s opportunity missed as Derby are defeated|
|Koeman: I am realistic on Champions League|
|League Two Review: Burton beaten again, Hartlepool gain welcome lift|
|´Triple punishment´ rule could be scrapped|
|Scottish Premiership Review: Inverness slip up as strugglers prosper|
|Mancini wary of Fiorentina quality|
|Hearts attack hits double figures in Scotland|
|West Brom 1 Southampton 0: Berahino wins it, then limps off|
|Manchester United 2 Sunderland 0: Rooney at the double amid red card controversy|
|Newcastle United 1 Aston Villa 0: Cisse strike downs visitors|
|Stoke City 1 Hull City 0: Super sub Crouch secures win|
|Granada 1 Barcelona 3: Suarez inspires routine win|
|Burnley 0 Swansea City 1: Trippier own goal proves decisive|
|Borussia Dortmund 3 Schalke 0: Late show seals dominant derby win|
|Referee Dowd fails to make it through West Brom, Saints clash|
|Allardyce ´shocked´ after home loss|
|Pardew lauds Murray after ´mixed afternoon´ for striker|
|West Ham 1 Crystal Palace 3: Pardew enjoys more away-day success|
|Blanc: PSG prepared for confident Monaco|
|Ancelotti: Isco place is non-negotiable|
|Pellegrini out to end dismal record at Anfield|
|Roma v Juventus: Matri eyes glory in title tussle|
|Martinez wary of wounded Arsenal|
|A-League Review: Spectacular Sydney derby the highlight|
|Perez to testify in corruption case|
|Bentaleb determined to avoid European hangover|
|Liverpool cannot dwell on Europa exit, says Rodgers|
|Marquinhos welcomes Manchester United interest|
|Tottenham must be ´nearly perfect´ to beat Chelsea - Pochettino|
|Bielsa: I take responsibility|
|League Cup final ´most important´ for Mourinho|
|Rodgers unsure if European exit will be a blessing|
|Vitoria Guimaraes 1 Maritimo 0: Hosts end winless run|