Marcus Rashford took advantage of a rare occurrence Saturday.
VAR overturned referee Anthony Taylor's initial decision to not penalize Manchester City midfielder Bernardo Silva's foul on the Manchester United forward, and Rashford scored on the ensuing penalty to give the Red Devils a 1-0 lead over their intracity rivals Saturday at City of Manchester Stadium.
Rashford nearly built upon his 23rd-minute penalty twice in the ensuing moments, missing wide on a counter-attack and hitting the crossbar soon after.
But six minutes after Rashford's goal, Anthony Martial doubled United's advantage.
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City needed to win Saturday to keep their increasingly slim English Premier League title hopes alive.
That much, like VAR's decision to award United a penalty Saturday, was clear and obvious: The Cityzens dropped 14 points back of first-place Liverpool thanks to Saturday's loss.
Mo Salah's 93rd-minute goal in a 2-0 win over Manchester United on Sunday at Anfield didn't mean much to the result.
After all, the Reds were seconds away from a victory that moved the Premier League leaders 16 points clear (with a game in hand) of second-place Manchester City. But no goal signaled the league's futility in trying to stop Liverpool's march to history quite like Salah's 11th goal of this Premier League campaign.
Liverpool goalkeeper Alisson Becker booted a ball from his box into Manchester United's half following a corner kick, with Salah yards clear of the Red Devils' last line of defense. Daniel James caught up to Salah, but the Egyptian striker fought of his challenge to cooly finish past United keeper David de Gea.
Alisson sprinted upfield to celebrate with a shirtless Salah, and for good reason: His assist was the first by a Liverpool keeper in nearly a decade.
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With Sunday's result -- and, clearly, Liverpool's first Premier League title -- well in hand, the faithful at Anfield finally acknowledged their reality, singing "We're going to win the league" for the first time this season.
Salah's stunner simply crystallized the inevitability of Liverpool's first top-flight title in 30 years.
Manchester United (9-7-6; 34 points) have European qualification on the line, but playing spoiler Sunday against rival Liverpool (20-1-0; 61 points) at Anfield might provide bigger motivation.
The Reds are marching towards history, with their first Premier League title merely a formality at this point. United can end Liverpool's unbeaten run in the league -- and longer on at home -- by springing the upset Sunday, which would provide embattled Red Devils manager Ole Gunnar Solskjaer a needed boost down the stretch. Winning Sunday would also cut fourth-place Chelsea's lead to just two points, with two sides set to square off in a month.
Liverpool should be up for it Sunday, as Manchester United are the only club to earn points at the Reds' expense this season. Jurgen Klopp's side will be motivated to avoid a repeat at Anfield.
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Here's how to watch Sunday's Liverpool-Manchester United match online and on TV.
When: Sunday, Jan. 19 at 11:30 a.m. ET/8:30 a.m. ET
Online: NBC Sports