Manchester United v Liverpool: What to look out for in meeting of giants..
Manchester United and Liverpool go head to head this weekend in one of English football's big rivalries - and it is as important as ever.
Both sides have rivals from the same city in the Premier League, but for many the big one is the meeting of the sides separated by 32 miles.
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This is their 202nd meeting, with United winning 81 times and Liverpool 68 so far.
The last match between these sides - at Old Trafford in May - was postponed as United fans protested against the club's owners. Liverpool won the rearranged game 4-2.
United are trying to show they can compete for the big trophies this year, as Liverpool look to bounce back from last season's disappointment.
BBC Sport looks at some potential talking points.
United are sixth in the table going into Sunday's action with four wins, two draws and two defeats from eight games.
Ole Gunnar Solskjaer's side only have one point from their last three games and, if they are to challenge for the title, they must find some form quickly.
In four of the past seven seasons, the title winners have only lost two or three league games all season.
Last season, Manchester City won the title with 86 points, the lowest title-winning haul since Leicester in 2016. To even reach that amount, United need to average 2.4 points a game for the rest of the season.
Liverpool, in third place, are unbeaten - but their gap over United would only be a point if the Red Devils win.
BBC Sport's Simon Stone said: "Speak to some Manchester United fans and they are quietly optimistic about their meeting with Liverpool.
"Their team might have only won three of their past eight games but, the theory goes, Liverpool at Old Trafford is exactly the kind of game in which United's star names will excel.
"Frequent discussion about never knowing which United team will turn up really revolves around inherent weaknesses in the manager's preferred 4-2-3-1 formation.
"At the top of the pitch, the players don't work hard enough when they do not have the ball, it is claimed. That puts pressure on those behind.
"No matter which personnel are deployed, the midfield two do not function effectively as a pivot between defence and attack, which exposes issues, either technical or physical, at the back, exposing David de Gea in goal."
Solskjaer turns it round under pressure again - but which Man Utd will turn up against Liverpool?
Selector: Your combined Man Utd & Liverpool team
Liverpool, the 'forgotten' title contenders?
There was a strange dynamic in the summer when everybody was predicting a two-way title race between Manchester City and Chelsea.
Of 20 BBC pundits, 13 tipped City and seven tipped Chelsea, with nobody expecting Liverpool to win the title.
One expert even predicted Liverpool would not finish in the top four.
But Liverpool won the 2019-20 Premier League title by 18 points - and were 33 points above third place.
They finished in third, 17 points behind City last season - but they were hindered by several defensive injuries, most notably to Virgil van Dijk.
The Dutch centre-back has now returned and Liverpool are unbeaten in 12 games in all competitions this season, scoring 36 goals.
Cristiano Ronaldo's move back to Old Trafford made all the headlines this summer but he is being outshone by Mohamed Salah in the Premier League this season.
Salah has scored seven goals in eight games - including two goal-of-the-season contenders. He is joint top of the scorers list with Jamie Vardy - and joint second on assists with four.
Ronaldo, by contrast, has three goals and no assists in five games - fewer than Hwang Hee-chan, Ismaila Sarr, Callum Wilson and Neal Maupay.
In all competitions, the gap between Salah (12 goals) and Ronaldo (six goals) is starker.
Salah is known by Liverpool fans as the king - can he now prove he is the Premier League's top star?
Reds boss Jurgen Klopp said: "Why should we compare Cristiano Ronaldo and Mo Salah? Obviously both are world-class players, so that's how it is.
"I would say even when Ronaldo's left foot is not that bad, I would say Mo's left foot is probably better.
"Maybe Cristiano in the air is slightly better and the right foot is probably better. But speed-wise they are both pretty quick, very desperate to score goals - so maybe that's it."
Solskjaer said he would back Ronaldo "in any competition".
"His [Ronaldo's] goalscoring record is incredible and he just keeps on scoring. That being said, Salah, at the moment, he's on fire.
"You see some of the goals he's scored lately - we know we have to be at our best to defend against him."
Mo Salah scored can become the first Liverpool player to score in three consecutive away games against Manchester United this weekend
What else have the managers said?
Solskjaer is yet to beat the Reds in the league as United boss, while Liverpool's recent form has them unbeaten in 21 games overall dating back to April and they've scored three goals or more in their last eight away matches in all competitions - including this week's 3-2 victory over Atletico Madrid.
Solskjaer said: "It's going to take everything to get a result against one of the best teams in Europe and the world.
"They are one of the teams we are trying to chase, because what they have done in the last four years is something we are striving towards and to go past them.
"We did end up above them last season, but they had a very bad spell of injuries and now they are back to their best."
And after ex-Manchester United midfielder Paul Scholes claimed Klopp would not fear Manchester United, the Liverpool boss said: "There was not one second when I was rubbing my hands together watching that game. You could see Atalanta caused United problems but the second half was a pure power presentation from United."
Klopp added that he's been preparing his side for a "tough game against a really good opponent" and said "we all know United can do incredible stuff".