Tottenham may have hit the ground running under Ange Postecoglou, while Manchester City looked back to their best as they swept Manchester United aside at Old Trafford on Sunday.
Jude Bellingham has propelled Real Madrid to the top of LaLiga, while Inter Milan have been near flawless in Serie A so far this season.
But Fenerbahce remain the form team in European football, after racking up a 19th consecutive win in all competitions this season.
The Istanbul giants made it 10 wins in 10 Super Lig games on Sunday, winning 5-0 away at Pendikspor to remain two points ahead of arch-rivals Galatasaray at the top of the table.
Fenerbahce have looked just as unstoppable in Europe, firming their grip on their Europa Conference League group with a 3-1 victory over Bulgarian side Ludogorets Razgrad on Thursday night.
That followed earlier group phase wins over Danes Nordsjaelland and Spartak Trnava of Slovakia but, even more impressively, Fenerbahce had already fought through three qualifying rounds to get that far.
They saw off Zimbru Chisinau of Moldova, Maribor of Slovenia and FC Twente of the Netherlands, winning all six legs along the way.
Former Manchester City star Edin Dzeko netted a hat-trick in the 5-0 demolition Pendikspor, bringing his tally for the season to 12 goals in 14 games in all competitions.
The Bosnian, who arrived from Inter Milan on a free transfer in the summer, isn't the only Fenerbahce player with Premier League connections in coach Ismail Kartal's squad.
Brazilian midfielder Fred signed from Manchester United at the start of the season and has so far featured in 14 of Fenerbahce's 19 games, setting up five goals.
Fred is joined in midfield by Dusan Tadic, who spent four years at Southampton, and signed for
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