John McEnerney: That and the Real Madrid job, without doubt the most life-sapping jobs in sport. Fickle boards fans brainwashed by a daily tsunami of codswallop and they'll help crucify a coach. Every coach at Real and Barca is a dead man walking from day one. Savage pressure

Mentally jaded FC:  Being an Arsenal fan... 

At least being an Arsenal fan is fairly predictable...

We are under way at the Nou Camp. Will Barcelona go top again?

Barcelona are pretty much at full strength. Captain Andres Iniesta, yet to really get going after returning from a third injury this season, is on the bench. Their three superstars all start up front.

Iago Aspas, the fourth top scorer in La Liga this season, starts up front for Celta Vigo with John Guidetti. Giuseppe Rossi is on the bench.

Barcelona:  Ter Stegen, Roberto, Pique, Umtiti, Alba, Rakitic, Busquets, Rafinha, Messi, L Suarez, Neymar. Subs: Cillessen, D Suarez, Turan, Iniesta, Mascherano, Alcacer, Digne.

Celta Vigo:  Sergio, Mallo, Cabral, Gomez, Roncaglia, Jonny, Radoja, Wass, Bongonda, Aspas, Guidetti. Subs: Villar, Planas, Diaz, Sisto, Beauvue, Jozabed, Rossi.

Image source, .

Anyway, onto tonight's game. Barcelona will go back to the top if they beat Celta Vigo tonight. Real Madrid went above them earlier today with a 4-1 win over Eibar.

The Catalans are unbeaten in 18 La Liga games - 13 wins and five draws.

Tonight's opponents Celta Vigo - the club Enrique left for Barca in 2014 -  are the definition of mid-table. They sit 10th with a goal difference of zero.

We want to know if you think managing Barcelona is the most draining football job in the world. If not, what is?

Let us know using #bbceurofooty on Twitter or by commenting on the Match of the Day Facebook page.

If that reasoning sounded familiar, it's because Pep Guardiola said something similar when he decided to end his all-conquering reign in 2012.

"The reason is simple: four years is enough," said the now Manchester City boss.

"I'm drained and I need to fill up. The demand has been very high and a manager must be strong.

"Time has taken its toll - I rise each day and don't feel the same.

"You can only recover by resting and getting away from everything. It would have been a bad idea to continue." 

Image source, Getty Images

On Wednesday, in the immediate aftermath of a 6-1 win over Sporting Gijon, Barcelona boss Luis Enrique announced that he would leave the job at the end of the season.

The reason? 

"It's about how I live with my profession, with a never-ending quest for solutions and to improve my team. That means I have very little time to rest, very few hours to disconnect.

"I think it will be good for me at the end of the season, because I need to rest. That's the principle motive."

Image source, Getty Images