Barcelona faces another test of its post-Messi era when Real Madrid visits Camp Nou on an action-packed Sunday that also features a clash between the Spanish league leader and its defending champion.

The first clásico since Lionel Messi left for Paris will inevitably overshadow an equally enticing visit by Real Sociedad to Atlético Madrid. The Basque Country side with its sleek attacking style leads the league, while the titleholder boasts the deepest attack in the competition.

The Champions League yet again served up drama, incredible comebacks and goals galore this week.

And then there was Juventus.

Jose Mourinho's Roma was routed 6-1 by Norwegian team Bodø/Glimt in the Europa Conference League on Thursday, the first time the Portuguese manager has seen one of his team's concede six goals in a game.

Roma is one of the big favorites to win UEFA's new third-tier competition but trailed 2-0 after 20 minutes and conceded four more goals after the break. It was the Italian team's first loss after winning its first two group games.

A look at what's happening in European football on Friday:

ENGLAND

Bayern Munich president Herbert Hainer became the latest high profile football figure to criticize FIFA's idea of staging a World Cup finals every two years saying "you must never sacrifice football on the altar of financial interests."

Liverpool came close to missing out on this season's Champions League but with Mohamed Salah in stunning form and a clean bill of health, Jurgen Klopp's men look like contenders for the trophy once more.

Barcelona will have to beat Dynamo Kiev to have any chance of reaching the knock-out stage of the Champions League, coach Ronald Koeman said on Tuesday.

English Premier League clubs moved on Monday to prevent Newcastle immediately striking lucrative sponsorship deals with companies linked to its new Saudi ownership.

Clubs held an emergency meeting to impose a freeze on any of them agreeing to commercial arrangements with businesses their owners are associated with, a person familiar with the decision told The Associated Press. The person spoke on condition of anonymity to confirm details of a report published by The Guardian late Monday.

Arsenal fans were nearly haunted by the return of club hero Patrick Vieira.

Vieira was back this time as Crystal Palace manager and his team was just about to beat the Gunners at Emirates Stadium.

FIFA and Qatari organizers of next year's World Cup teamed up with the World Health Organization on Monday to use soccer's marquee event for promoting public health.

The move follows years of scrutiny on Qatar and criticism of conditions for hundreds of thousands of migrant workers needed for massive projects tied to the tournament.