Rafa Benitez's much-changed side with a youthful streak had looked set to coast through when Sean Longstaff's deflected shot put them ahead after 56 seconds and Callum Roberts volleyed home a second four years since his only other Newcastle appearance.
Tuchel has agreed an 18-month contract with the option of another year, the west London club announced.
Valencia and Argentina defender Ezequiel Garay said on Sunday that he has tested positive for the coronavirus, becoming the first La Liga player to confirm he has the virus that has wreaked havoc on global sport.
Tottenham Hotspur's status as Premier League title chasers was seriously harmed on Saturday as they fell to a first defeat in seven league games, losing the lead to go down 3-1 at home to Wolverhampton Wanderers.
Video footage showed Tottenham's Eric Dier climbing over seats and confronting a home fan before he was restrained by security guards and other fans. He was eventually led away.
Manchester City's long winning run in the Premier League finally came to an end
Son Heung-min travelled to Seoul for surgery on a fractured arm and will be out of action in any case for several weeks, but Spurs say they will follow British government recommendations while he continues his rehab on his return.
The top three places in the Premier League table look secure for Liverpool, Manchester City and Leicester City, but the fourth spot, currently occupied by Chelsea, remains tantalisingly within reach for several clubs including Carlo Ancelotti's Everton and Ole Gunnar Solskjaer's United.
The win moved Liverpool level with City on 86 points in the standings
For the only eighth time in Premier League history, the title will be decided on the final day
Three months after the last ball was kicked, the Premier League emerges from the shadow of the COVID-19 pandemic this week for what will be a 92-match slog to the finish.
Tottenham Hotspur and Liverpool raised the spirits with a rip-roaring 2-2 draw in a pre-Christmas Premier League classic on Sunday after a weekend marred by COVID-19 related postponements.
"The best team won, we struggled from the beginning and we couldn't deal with their long balls. Usually, you press the ball to win it, but this was different. They defended so deep and so well," City coach Pep Guardiola told the BBC.
IMAGES from the English Premier League matches played on Saturday.
Kazakhstan's Astana fought back to beat a youthful Manchester United side 2-1 at home, Arsenal's woes continued as Frankfurt's Daichi Kamada scored twice to secure a 2-1 win.
A summary of Saturday's action in the Premier League.
Tottenham Hotspur secured a place in the Europa League next season as they closed out their Premier League campaign with a 1-1 draw at Crystal Palace on Sunday.
'There is a difference where we want to be in the Champions League, but when you're a club like Manchester United, there's a need to be in the Champions League'
Liverpool are champions and Norwich City, the side whom they beat on Aug. 9 to launch their title charge, are down and Manchester City are distant runners-up. After that everything is up for grabs.
IMAGES from the EPL matches played on Sunday.
Timo Werner scored his first goal of the season as a much-changed Chelsea side crept into the fourth round of the League Cup by beating Aston Villa 4-3 on penalties after the Stamford Bridge clash ended 1-1 on Wednesday.
Leicester City's traumatic week ended with a 1-0 win at Cardiff City although the result was never the chief concern on a day when the tributes flowed for the Midlands club's late owner Vichai Srivaddhanaprabha who died in a helicopter crash.
West Ham United and Chelsea both narrowly avoided ignominious FA Cup exits with narrow wins against lower-league opposition but Everton marked Frank Lampard's first game in charge by sauntering past Brentford into the fifth round on Saturday.
"The only truth is that I made the decision that Paul will not be a second (vice) captain anymore but no fallout, no problems at all," Mourinho said after his team were knocked out of the League Cup on penalties by second-tier Derby County.
The 13-year-old Burnley fan who made a racial slur against Spurs' Son Heung-Min will be made to work in conjunction with Kick It Out and Burnley FC in the Community programs.
Arsenal became the highest-profile casualties of the FA Cup third round as the 14-time winners lost 1-0 at Nottingham Forest, but Liverpool and Tottenham Hotspur avoided early exits after scares against lower-league sides on Sunday.
Images from the English Premier League matches played on Saturday
City's dream of a quadruple of titles ended with their away-goals loss after Wednesday's second-leg ended with a 4-3 win, but a 4-4 aggregate score.
Arsenal's new manager Unai Emery faces a baptism of fire after the Gunners were handed an opening day fixture at home to Premier League champions Manchester City.
Images from the football matches played on Tuesday.
Premier League leaders Manchester City recovered from two goals down to beat Championship side Swansea City 3-2 at the Liberty Stadium on Saturday and progress to the FA Cup semi-finals.
Images from Saturday's action in the Premier League.
Manchester United took a big step towards the Europa League quarter-finals by thrashing Austrian side LASK Linz 5-0 on Thursday in their last 16 first-leg tie at an empty Linzer Stadium due to the coronavirus pandemic.
Images from the English Premier League matches played on Saturday.
Inter Milan midfielder Christian Eriksen scored his first goal for the club since last month's move from Tottenham Hotspur to set up a 2-0 win at Ludogorets Razgrad in their Europa League last 32, first leg on Thursday. Getafe pulled off a surprise 2-0 home win over last year's Champions League semi-finalists Ajax Amsterdam, while Manchester United were held 1-1 at Club Brugge in wet and windy conditions. Wolverhampton Wanderers' Diogo Jota scored a second successive hat-trick in the competition to lead his side to a 4-0 victory over Espanyol and Arsenal won 1-0 at Olympiakos Piraeus with a late Alexandre Lacazette goal.
News of all that's transpired on and off the football field.
News of all that transpired on and off the football field.
News of all that's transpired on and off the football field
Liverpool have the joint biggest lead in top-flight history at this stage of the campaign and no team has ever failed to win the title with an advantage of this size. Already there is talk of Liverpool going through the league entire season unbeaten -- matching the 'The Invincibles' of Arsenal in 2003/04 and Preston North End in 1888/89.
A preview of the line-up action in the English Premier League.