Watford goalkeeper Ben Foster, speaking to Match of the Day: "If I score at the end that's me retiring. Fair play to Kepa - that was some save.
"Chelsea are a very good team with a lot of good energetic players, it is good for them and for England.
"I am frustrated on one hand, but on the other hand we could have also lost the game," manager Eddie Howe said.
"Keeping a clean sheet away from home is positive, but having our third game without scoring is certainly negative.
Wolves boss Nuno Espirito Santo has called on his side to "embrace the challenge" of matching England's top teams by combining domestic and European success, after winning their first Premier League game of the season against Watford
Santo said: "We play on a Thursday, we have to travel.
Will Hughes' early goal helped Watford secure their first Premier League point of the season with a battling draw at Newcastle.
In a game of few clear-cut chances, Hughes steered the opening goal into the bottom left corner from 10 yards after just 78 seconds following a deflected Tom Cleverley shot.
Record signing Sebastien Haller believes that West Ham's opening Premier League victory at Watford can "launch" their season
"Sebastien Haller's goals were two very important goals for him," Pellegrini said.
Manchester City rounded off an outstanding season by crushing Watford at Wembley to clinch a historic domestic treble.
Raheem Sterling and Gabriel Jesus both scored twice as Pep Guardiola's team became the first English men's side to achieve the feat of winning the Premier League, FA Cup and Carabao Cup in the same season.
Mark Noble scored twice as West Ham thrashed 10-man Watford 4-1 at Vicarage Road to leapfrog their hosts and secure a top-half finish in the Premier League.
Watford vs West Ham United Highlights
Start date: 12.