Nuno's coaching staff have also been relieved of their duties. The club have not yet announced a replacement but British media reported former Chelsea and Inter Milan boss Antonio Conte is linked.
The other semi-final will see an Italian side, Milan or Roma, come up against Bayer Leverkusen or West Ham.
Michael Carrick and Ander Herrera have hardly featured in Manchester United's early Premier League campaign but manager Jose Mourinho has assured the duo they are vital to his plans.
A summary of sports events and sports persons, who made news on Thursday
While Sunday's clash was the last time Klopp and Guardiola will face off for Premier League points, as far as this year's title race is concerned it merely made things even more interesting with Arsenal ahead of Liverpool on goal difference and City one point back. All three have 10 games left.
Arsenal sailed through the Europa League group stages, winning five of their six group matches and take on Sporting next, who overcame Denmark's FC Midtjylland in their playoff.
I'm not happy with just fighting for fourth, I want to fight for trophies, says manager Jose Mourinho
Jose Mourinho admitted that Sunday's 2-0 defeat to Arsenal means it will now be "impossible" for Manchester United to finish in the top four.
Manchester United manager Jose Mourinho is targeting the second half of the season to build on the team's recent improvement and launch a serious Premier League challenge.
Rashford also credited former team manager Jose Mourinho for making him a better player.
'I think it's unacceptable what he does to Koscielny. He pushes him down, he hits him in the face. I do not understand Mike Dean's decision at all. Why does Diego Costa stay on the pitch and Gabriel is sent off?' 'If you want to speak about Diego Costa with me, it's just to say he played like he has to play and that's why you have full stadiums, you sell to television around the world for millions and millions because the game has to be played like that'
Manchester United striker Romelu Lukaku, the subject of criticism from the club's fans, should be "untouchable", his manager Jose Mourinho said.
"To say I'll be happy for Argentina (if they win), that will not be true, it would be a lie, I will not be a hypocrite," Ronaldo said in an interview with the Spanish daily Marca.
Chelsea could be without Cesc Fabregas and Filipe Luis for clash against Manchester City
Woeful defending led to two Brighton goals in two first-half minutes as 34-year-old Glenn Murray and Shane Duffy outsmarted United's 117 million pound ($149.21 million) back four to demonstrate why manager Jose Mourinho had sought to upgrade it.
Manchester United forward Memphis Depay is unhappy at being relegated to a bit-part role under new manager Jose Mourinho and has demanded more playing time after failing to start a Premier League game this season. The 22-year-old has dropped down the pecking order behind Anthony Martial, Marcus Rashford, Juan Mata and Jesse Lingard at Old Trafford, making just three appearances from the bench in the current league campaign.
Mourinho miffed at United players' attitude in St Etienne win
Jose Mourinho got the perfect birthday present when his Chelsea side beat Stoke City 1-0 in the FA Cup fourth round at Stamford Bridge on Sunday, Brazilian midfielder Oscar scoring the goal from a stunning free kick.
IMAGES from Serie A matches played on Saturday.
Manchester United battled back from two goals down to beat Newcastle United 3-2 at Old Trafford on Saturday as a 90th-minute winner from Alexis Sanchez completed a spirited comeback to ease the pressure on manager Jose Mourinho.
The Wolfsburg winger reckons he didn't enjoy Jose Mourinho's trust during his stay at Stamford Bridge
If Chelsea manager Jose Mourinho is to be taken seriously then the deal is probably done. Mourinho hinted on Friday that Brazil playmaker Willian has chosen to join Chelsea ahead of Tottenham Hotspur.
Following is a match by match look at the English Premier League's weekend fixtures.
De Boer, who lasted only 77 days as Crystal Palace manager after losing his first four league games in charge with no goals scored, said in an interview on BT Sport that it was "a pity" Mourinho was Rashford's manager because he was not getting enough chances.
IMAGES from the soccer matches played across European leagues over the weekend.
Chelsea manager Antonio Conte got the upper hand on Jose Mourinho for the second time this season as his double-chasing side beat 10-man Manchester United 1-0 at Stamford Bridge to reach the FA Cup semi-finals on Monday.
High drama ensued during the English Premier League matches on Wednesday as Spurs manager Jose Mourinho was booked while Brighton stunned Chelsea via Alireza Jahanbakhsh's superb equaliser to deny the Blues victory. Here is all the EPL action in IMAGES from Wednesday's matches.
Two bad results do not make a crisis but Chelsea must break with the past and change their style of play to get back on top in the Premier League and Europe, manager Jose Mourinho said on Friday.
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.
Manchester United manager Jose Mourinho said Friday's draw for the last 16 of the Europa League against Russian side Rostov has been unkind to his team, the favourites.
Manchester United manager Jose Mourinho has promised to show plenty of restraint and respect if he inflicts a first Premier League defeat of the season on his former side Chelsea on Saturday.
The first legs of the ties will take place on February 16, with the return match a week later on February 23.
Leicester's Mahrez finds form in time for January sales
Manchester United stretched their winless Premier League streak to four games after their manager Jose Mourinho and midfielder Ander Herrera were sent off in a 0-0 home draw with Burnley on Saturday.
Manchester United might have left themselves too much ground to make up in the Premier League title race as they trail leaders Chelsea by 11 points after 13 games, according to their manager Jose Mourinho.
A preview of the line-up action in the English Premier League.
If, as former British Prime Minister Harold Wilson once said, a week is a long time in politics, four and a half months in football clearly represents an eternity.
Chelsea manager Jose Mourinho, famous for often surreal quotes, returned to a favourite theme on Tuesday when he described his players as "beautiful, young eggs".
David Moyes made light of his first dismissal when he leapt over a fence into the stands to watch the rest of the match and accepted crisps from a girl.
The game at Huddersfield is the first meeting between the clubs since 1972 and the Yorkshire side have not won one since 20 years before that, in March 1952.