Napoli's Dries Mertens has urged the club to rediscover their best form after being knocked out of the Champions League on Wednesday.
Having been knocked off top spot in Serie A last week, Napoli's Champions League ambitions were thwarted at Feyenoord.
Although three of the four group winners are already decided, there is plenty up for grabs in Wednesday's Champions League action.
Napoli's crunch Champions League clash with Feyenoord on Wednesday will not feature forward Lorenzo Insigne due to injury.
If Phil Foden becomes the first breakthrough star of the Sheikh Mansour era at Man City a forgettable win over Feyenoord will be a landmark.
A draw against Feyenoord would have been enough for Manchester City to clinch top spot, but Raheem Sterling earned a late win.
Tuesday's Champions League action may be pivotal for the likes of Borussia Dortmund and Napoli, as we examine the numbers behind the games.
Pep Guardiola appreciates Manchester City being placed among Europe's elite, but he reminded his team they had achieved nothing yet.
Pep Guardiola feels Gabriel Jesus and Sergio Aguero both deserve to play but Benjamin Mendy's injury complicates matters at Manchester City.
Giovanni van Bronckhorst believes Feyenoord "still have a chance" to leapfrog Napoli into third in Group F.