Here are 5 reasons why rivals Manchester City, currently sitting in fourth, may have to watch on nervously!

1. Stirling 20-0 Selkirk (1984)

Stirling racked up one of the biggest domestic wins of the 20th century against part-timers Selkirk in the Scottish Cup first round at Annfield.

Leading 5-0 at the interval, the hosts went on to net 15 after the break, with winger Davie Thompson finishing the match with seven goals.

Selkirk player-boss Jackson Cockburn later admitted his attempt at a motivational half-time team talk had backfired.

"In retrospect, I shouldn't have told them at half-time, 'if we don't get our fingers out, this might reach double figures'," Cockburn said.

2. Australia 31-0 American Samoa (2001)

Already ranked the worst in the world by FIFA, American Samoa had another reason to fear their World Cup qualifier against Australia, after all but one of their original 20-man squad was deemed ineligible due to passport issues.

"We are asking the Lord to keep the score down," American Samoa coach Tunoa Lui said before kick-off.

The Lord was not listening as Australia cruised home with a then world record score - Archie Thompson and David Zdrilic scoring 13 and eight goals respectively - and the American Samoa team's plight was subsequently chronicled in the award-winning documentary, 'Next Goal Wins'.

3. Arbroath 36-0 Bon Accord (1885)

In another Scottish Cup first round romp, John Petrie helped himself to 13 goals as Arbroath thumped amateurs Bon Accord at Gayfield.

The visitors' day started badly when they turned up without a kit, and it could have been even worse after five further Arbroath goals were disallowed.

Home goalkeeper Jim Milne did not touch the ball through the entire game, and borrowed an umbrella from a friend in the crowd to keep dry.

Bizarrely on the same day, Dundee Harp beat Aberdeen Rovers 35-0 just down the coast.

4. Vanuatu 46-0 Micronesia (2015)

Micronesia coach Stan Foster sought to put his side's Pacific Games hammering, coming just days after 30-0 and 38-0 losses to Tahiti and Fiji, into perspective.

"Most of these kids have never been out of their villages let alone on to another island," said Foster of his young side's star-struck performance in the spotlight.

"I took them to Guam the other day [and it was] the first time they've been on an elevator or an escalator. It was a huge step up."

5. AS Adema 149-0 So L'Emyrne (2002)

Everyone knows the Madagascar League is the place to go for goals, but even the supporters in Antananarivo will have been surprised by the world record scoreline in a Championship play-off game.

Visitors L'Emyrne, angered by refereeing decisions in a previous game, protested by scoring 149 own goals while the hosts stood idly by.

Barring an unknown Bournemouth beef with officialdom at Old Trafford on Wednesday, this tactic is unlikely to come up trumps for Louis Van Gaal.