Goals from Freddie Hinds, Bobby Reid and Niclas Eliasson put the visitors through to the third round. Watford finished with 10 men after Jose Holebas was sent off.
Manchester City suffered their first home Premier League loss in eight months as a shock 3-2 defeat by Crystal Palace on Saturday left Pep Guardiola's champions trailing leaders Liverpool by four points.
Tottenham Hotspur's Son Heung-min returned to form with two goals in his side's 3-0 defeat of second-tier Preston North End in the FA Cup fourth round and Casemiro also grabbed a brace in Manchester United's 3-1 win over Reading.
Manchester City host Tottenham Hotspur on Saturday on the back of a record 15 successive English Premier League wins, and on the basis of their visitors' recent away form, a 16th victory appears to be the likely outcome.
Son Heung-min's thunderous finish helped Tottenham Hotspur secure a 2-0 victory at Leicester City and Liverpool eased past fourth-tier Exeter City 3-0 in FA Cup third-round replays on Wednesday.
Photos from the English Premier League matches played on Saturday
India on Monday strongly condemned violence against the Indian community and vandalisation of Hindu premises in the eastern England city of Leicester as it sought immediate action against those involved in these attacks.
Diaz double puts City in quarters, De Bruyne injured
A round-up of Saturday's action in the Premier League.
Ashley Williams powered home a towering header in the 86th minute as Everton fought back to claim a 2-1 win over Arsenal as the title hopefuls blew the chance to return to the Premier League summit.
A round-up of Saturday's action in the Premier League.
'I'm probably one of the only ones that disagrees, for the simple fact that we only had three games that we were below standard.'
Manchester City tightened their stranglehold at the top of the Premier League on Wednesday by trouncing bottom club West Bromwich Albion 3-0 as nearest rivals Manchester United suffered a chastening 2-0 defeat at Tottenham Hotspur.
Jamie Vardy scored his first goal in the Champions League to give Leicester City some hope of staying in Europe's elite competition despite a 2-1 loss to an utterly dominant Sevilla in Wednesday's last-16 first leg.
Sublime goals from Jamie Vardy and Riyad Mahrez sent Leicester City back to the Premier League summit after a deserved 2-1 win over lacklustre Chelsea whose march to the title last season seems a distant memory.
Sheffield United's David McGoldrick scored twice as they stunned Chelsea with a 3-0 win at Bramall Lane on Saturday, loosening the visitors' grip on a Premier League top-four place. Raheem Sterling struck a hat-trick as Manchester City crushed Brighton 5-0 at the AmEx Stadium in the Premier League on Saturday.
Having headed into the match tied on 47 league goals with West Ham's former stalwart Paolo Di Canio, Antonio was delighted to have surpassed the Italian as he celebrated by lifting a cardboard cut-out of himself at the side of the pitch.
Qualifying Newcastle United for the Champions League was not even in Eddie Howe's thoughts at the start of the season
Successive home defeats by leaders Leicester City and second placed Tottenham Hotspur have left City six points off the pace with serious doubts about whether their expensively-assembled squad is still playing for the manager.
Leicester City striker Jamie Vardy was officially presented with Guinness World Records certificate in honour of his 11 game record goal-scoring run in the English Premier League.
Manchester City manager Pep Guardiola denied reports that his contract contains a 'break clause' that could allow him to leave at the end of the season. The Spaniard signed an extension last year until 2021 but with City's hopes of a third successive Premier League title now looking remote, questions have been raised about his future.
Harry Maguire said he can deal with hostile treatment from opposition supporters and that it takes the pressure off his England teammates.
A summary of Tuesday's League Cup matches.
Prime Minister Keir Starmer's office on Friday apologised for a 'mistake' in the organisation of its Diwali reception at 10 Downing Street after some British Hindus objected to non-vegetarian food and alcohol being served at the gathering.
Gabriel Jesus came off the bench to secure Manchester City a 1-0 English Premier League victory at Leicester City after yet another penalty miss by Pep Guardiola's side on Saturday. Chelsea's Olivier Giroud and Marcos Alonso returned to the starting lineup to stunning effect by grabbing a goal apiece in a crucial 2-1 home win over Tottenham Hotspur in the battle between the London rivals for fourth place.
James Rodriguez netted twice and Dominic Calvert-Lewin became the first Everton player to score in the opening four matches of a Premier League season as they beat Brighton & Hove Albion 4-2 on Saturday to stay top of the table with a maximum 12 points.
City were given a stern test on a wet and windy night at a noisy Kassam Stadium but two goals from Raheem Sterling eventually saw them through.
The following is a look back on key moments in the thrilling Premier League title race, won by Manchester City on Sunday:
ManchesterCity winger Raheem Sterling has said a first Champions League quarter-final will not be enough and the English side should be aiming to lift the trophy with the talent in their squad.
Third-placed Leicester go to Hodgson's sixth-placed Crystal Palace on Sunday
Claudio Ranieri was named the League Managers' Association (LMA) manager of the year on Monday after leading 5,000-1 outsiders LeicesterCity to an improbable Premier League title.
Daniel Ceballos fired Arsenal into the FA Cup semi-finals with a stoppage-time goal that sealed a 2-1 win over Sheffield United
Chelsea and Manchester City tightened their stranglehold on the Premier League title race on Saturday, recording victories over struggling clubs to stretch further clear of their increasingly forlorn pursuers.
Belgian defender Vincent Kompany said he would be leaving Manchester City after helping the Premier League club to a become the first team to win the English treble of league championship and both domestic cups.
The win left Chelsea in 11th position, a point and one place behind Newcastle but with a game in hand.
News of all that's transpired on and off the football field
Leicester City striker Jamie Vardy will serve a three-match suspension after the club's appeal against his dismissal during Saturday's 2-2 Premier League draw with Stoke City was rejected, the Football Association (FA) said on Tuesday.
Images from Saturday's action in the Premier League.
IMAGES from the EPL matches played on Sunday.