Newcastle United fans have felt equal levels of excitement and bewilderment at how their up-and-down team has fared so far this season.
In the Champions League, the Toon have looked energetic and vibrant, with eight goals coming their way across two wins in the illustrious competition.
Newcastle-1
Yet, back in the big time of the Premier League, Newcastle have looked lost and lethargic, instead of potential world-beaters, with a 3-1 defeat at the hands of a relegation-threatened West Ham last time out, seeing the Magpies sink to new lows.
Unfortunately, many of the old guard Eddie Howe has favoured since taking on the Newcastle job post are beginning to show very visible signs of decay, with Dan Burn a declining presence who is hard to defend at this point, heading into the Toon's latest European clash with Athletic Club.
Dan-Burn
Burn's decline at Newcastle
Before delving further into the number 33's out-of-sorts form in the here and now, it should be said that Burn is definitely viewed as a modern-day hero at St James' Park.
After all, the 6-foot-7 colossus was the man who headed home the all-important opener earlier this year to help Newcastle triumphantly lift the EFL Cup, as Howe continues to regularly wax lyrical about how "incredible" a servant the Blyth-born defender has been over the years on Tyneside.
But, Burn could now be overstaying his welcome, with the likes of Malick Thiaw - who joined in the summer from AC Milan - a shinier new model who will stay in the heart of Newcastle defence, you imagine, for the foreseeable future.
With Sven Botman rock-solid, too, as his consistent centre-back partner, Burn has had to make do with minutes as a makeshift left-back as of late, with the position not playing to his commanding strengths whatsoever.
Dan Burn and Eddie Howe for Newcastle
Away at West Ham, Burn failed to register a single successful dribble, which then limited Newcastle's attacking options down the left flank, with the 33-year-old also giving possession away a high 14 times.
With Lewis Hall edging back to full fitness, he could be in for a starting space against Ernesto Valverde's challengers in midweek as Burn is perhaps given a rest after a shaky couple of games in a row.
Nottingham Forest's Ola Aina in action with Newcastle United's Dan Burn
Howe will also have to push his sentiment to one side, again, with another possible alteration on Wednesday.
Newcastle star who's "nowhere near his best" faces the chop
Thankfully, some of the 47-year-old's long-standing servants continue to excel, so deep into their stays in the North.
Bruno Guimaraes - who has lined up for 168 games under Howe to date - finds himself three goals down this season in the Premier League already, which has led to pundit Michael Carrick hailing him as the club's ever-dependable "talisman."
Howe's most used current Newcastle players
Player
1. Bruno Guimaraes
= 2. Fabian Schar
= 2. Dan Burn
4. Jacob Murphy
5. Joelinton
Sourced by Transfermarkt
But, his fellow compatriot and midfield partner Joelinton isn't receiving similar praise right now, despite boasting a colossal 143 games under Howe's management.
Indeed, Joelinton - much like Burn - will be viewed as a modern-great amongst the hardened St James' Park masses long after he departs the building, with teammate Kieran Trippier branding him as a "machine" when he's at his high-octane peak.
With 31 goals and 21 assists up his sleeve too for Newcastle, Joelinton is clearly fondly respected and admired.
But, in the words of journalist Mark Douglas in mid-October, he has been "nowhere near his best" in recent times, as Newcastle continue to struggle to spark into life in the Premier League this season.
Only a sorry two strikes have come Joelinton's way this season, with both of those efforts coming against lowly Bradford City in EFL Cup action.
Joelinton
Moreover, the number 7 was one of Newcastle's worst culprits for looking lethargic against the Hammers, with just three of his seven duels being successfully won, as Lucas Paqueta and Freddie Potts controlled the game from the middle of the park for the hosts instead.
Last time out in Europe's top competition, both Lewis Miley and Jacob Ramsey were given run-outs in the middle, as Joelinton then came on against Benfica in the latter stages.
Newcastle's Joelinton
A similar refreshed look could be on display against the visitors from Bilbao, with Hall possibly given some crucial minutes back in the first team fold, too, in place of Burn.