Liverpool beat Watford 1-0 on Monday night to increase the gap between themselves and the rest of the chasing pack in the race for the Premier League top four.
After Arsenal's defeat at Tottenham and draws for both Manchester sides against two sides threatened by relegation Liverpool's victory at Vicarage Road pushed them four points clear of Mourinho's fifth-placed United side.
However Jurgen Klopp's men have played at least a game more than the teams placed between first and sixth.
EPL Table | Premier League standings after Gameweek 35
On Sunday Manchester City were held to a 2-2 draw at Middlesbrough only hours after United had spurned their chance to put pressure on two of their greatest rivals, dropping two points as Gylfi Sigurdsson struck a late free-kick to secure a point for Swansea at Old Trafford.
In the day's final kick-off Tottenham guaranteed themselves a finish above Arsenal for the first time since 1995 with a 2-0 win in White Hart Lane's final North London Derby. The result kept the pressure on Chelsea, who had beaten Everton 3-0 at Goodison Park.
Saturday had seen Sunderland's relegation from the Premier League confirmed after a 1-0 defeat to Bournemouth, whilst Crystal Palace became the first team to lose to Burnley at home, Ashley Barnes and Andre Gray scoring in a 2-0 win for the Clarets.
Leicester won 1-0 at West Brom whilst Southampton and Hull, and Stoke and West Ham played out goalless draws.