Chelsea head coach Thomas Tuchel believes Claudio Ranieri has made Watford a more courageous team in his short time in charge.
Ranieri has a rather underwhelming record of four defeats and two victories since succeeding Xisco Munoz at Vicarage Road just under two months ago.
However, those wins came in style as they saw off Everton 5-2 and Manchester United 4-1, the latter proving to spell the end of Ole Gunnar Solskjaer's spell at Old Trafford.
Tuchel can already see a difference between Ranieri's Watford and the one the Italian inherited as the two men get set to face off for the first time on Wednesday.
"We see a difference in data and the style of the games since he joined the club," he said. "They play with more confidence and, especially at home, they try to implement high pressing and are active.
"They try to be brave and courageous and they had a great result against Man United. They try to play with more emotion, more effort, to get the crowd behind them.
"It will be a pleasure to meet him. But we will do our best to get the three points tomorrow."
Chelsea dropped two points in the title race with a 1-1 draw at home to Manchester United on Sunday, the same day that Watford were beaten 4-2 by Leicester City.
The Hornets could be without as many as nine players for the visit of the league leaders, but Ranieri has backed his thin squad to cope during a gruelling period.
"I am confident (the squad will cope), but of course if I had all my players it would be better," he said.
"The club has a very good group of players and now, for those who have played less, is the right moment to show what they want to do in the Premier League.
"It's okay, I don't like to cry. I want to react, I want my players to be positive, confident and fight together."
Watford - Daniel Bachmann
The Hornets have conceded 14 goals since Ranieri's first match in mid-October - only Manchester United (16) have shipped more over that period. With Ben Foster out injured, Bachmann will again get the nod in goal on Wednesday. He has a save percentage of 59.26 this term, the second lowest of any Premier League keeper to have played more than three times behind Freddie Woodmann (45.45).
Chelsea - Jorginho
In the week he finished third in the Ballon d'Or voting, Jorginho will be looking to make it goals in back-to-back matches, having netted from the penalty spot last time out against Man Utd.
He has scored 13 of his 15 Premier League goals via spot-kicks - an 87 per cent ratio that is the highest ever of any player to have scored more than 10 times in the competition.
- Watford have lost seven of their last eight Premier League meetings with Chelsea, winning the other 4-1 in February 2018. The Hornets have conceded 21 goals in these eight games (2.6 per game).
- Chelsea have won their last two away league games against Watford, but have never won three in a row at Vicarage Road before.
- Since a goalless draw in February 2016, there has been 33 goals scored in eight Premier League games between Watford (12 goals) and Chelsea (21), at an average of 4.1 per game.
- Chelsea have not won any of their last five Premier League games played on a Wednesday (D2 L3). The Blues last had a longer winless run on a specific weekday between November 2010 and February 2011 (six games on Sundays).
- Watford have not kept a clean sheet in any of their last 23 Premier League matches, the longest current run of any team, and have shipped 45 goals in these games since a 3-0 win over Liverpool in February 2020.
Updated November 30, 2021