Crystal Palace, who have kept clean sheets in each of their past three Premier League games, take on a Manchester United side beaten by 10-man Everton on Monday. BBC Sport examines some of the key themes before Sunday's match (12:00 GMT).
Palace hard to score against
There are few sides tougher to break down than Palace right now. Last weekend's 2-0 win at Wolves means Oliver Glasner's team have gone 321 minutes without conceding a Premier League goal.
AdvertisementAdvertisementAdvertisementThe Eagles have also shipped just nine goals in their opening 12 league games, their lowest total at this stage of a season for 44 years.
Their total of 20 points, meanwhile, is their highest at this point of a top-flight campaign since 1991-92, when they eventually finished third.
While their points haul has been equally divided between home and away matches, they are particularly hard to beat at Selhurst Park.
Palace have not lost a Premier League match there since losing to Everton in February, a run of 12 games, which is the longest current unbeaten sequence at home in the competition.
United's mini-revival ended
Manchester United made unwanted history against Everton on Monday, losing their first Premier League home match in which the opposition went down to 10 men.
AdvertisementAdvertisementAdvertisementWith Benjamin Sesko and Matheus Cunha unavailable through injury, the Reds struggled to break down the Merseysiders. The result ended United's five-game unbeaten run and provided a reality check, according to head coach Ruben Amorim.
"These five weeks, everyone is praising our evolution," Amorim said afterwards.
"But I'm always saying the same things: we are nowhere near the moment we are meant to be in this club."
That is underlined by United's poor record against Crystal Palace and in London in general.
The Red Devils have failed to score in each of their previous four Premier League games against the Eagles and have won just three of their past 26 top-flight matches in the capital (all, incidentally, against Fulham).