Manchester City and Liverpool reach the halfway point of the Champions League group stage when the Premier League sides take on Napoli and Maribor respectively.
City's stunning start to the season that has seen them set the pace in the Premier League is set to be tested by a Napoli side who have won all but one of their opening 12 matches in all competitions.
Liverpool meanwhile are still chasing their first European victory of the season and will be desperate to grab all three points in Slovenia to kick-start their stuttering campaign following two draws.