Tottenham's 4-0 thrashing of Copenhagen on Tuesday night means the club have now gone 22 European games unbeaten at home.
So, why can't they repeat those results in the Premier League?
In comparison, in their last 22 league games inside the Tottenham Hotspur Stadium, Spurs have won just six times, drawing four and losing on 12 occasions.
The European unbeaten streak consists of 13 Europa League games, three Conference League games and six in the most prestigious of them all, the Champions League.
The opposition has at times been considerably easier than the Premier League elite, with Spurs beating the likes of NS Mura from Slovenia, and Pacos de Ferreira who currently compete in the Portuguese second division.
But they have also played some bigger clubs, facing Frankfurt twice, Italian giants AC Milan and Roma, and this season beating Villarreal - who currently sit third in La Liga.
From those 22 European fixtures, Spurs have scored 60 and conceded just 13, keeping a clean sheet on 13 occasions including in both of this season's Champions League ties. They have also failed to score in just one of those games.
In the league, they have scored just over half that amount with 31 goals, and conceded 34 - nearly three times as many when compared with their European record.
The difference in results might not come as that much of a surprise given their Europa League triumph in comparison with their finish in the league table last season.
However, with just one win from their opening five home league games this season, Thomas Frank will be desperately hoping they can convert some of their European success into domestic wins.
In the league, their next three league games consist of Manchester United, Fulham and Brentford respectively.
After their trip away to PSG, Frank's side face a visit from Slavia Prague before a tougher challenge against Borussia Dortmund in the Champions League.
So, Spurs fans, is the unbeaten European run simply down to easier opposition? Or is there another reason for the stark contrast in form? Have you noticed a difference in performances?