We don't wish to alarm you, but four games into the new Premier League season Watford are joint top with Liverpool and Chelsea .

Not only that, but Javi Gracia's Hornets — who won only four league games after he was appointed at the start of the year and didn't score a top-flight away goal after January 2nd — have won all four matches, including Sunday's comeback from 1-0 down to defeat Champions league side Tottenham .

Their fans can gaze happily at the league table for another fortnight as we are now into an international break, before a visit from Manchester United that will put Vicarage Road's 100 per centers to the test.

Here, our Watford correspondent Mike Walters looks at how they've pulled this off — and offers reasons why the Hertfordshire club aren't going to turn this into a stunning Leicester City-style title triumph.

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THREE REASONS WATFORD ARE JOINT TOP

CONTINUITY Gracia is the first Watford head coach to finish one season and start the next since they were promoted in 2015 – and it shows. The Spaniard arrived to a bedlam of indifference in January, but everyone knows about him and respects him now.

TWO UP TOP It is no coincidence Watford have won every Premier League game where talisman Troy Deeney and record signing Andre Gray have started as a double-act up front after both of them struggled as a lone striker last season.

BABY SHARK Argentine playmaker Roberto Pereyra, hampered by injuries and violent tackles last season, has decorated the Hornets’ flying start with three superb goals and his ‘Baby Shark’ celebration.

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THREE REASONS THEY WON'T STAY THERE

THE PEP FACTOR Manchester City were in transition, and falling off the pace under Manuel Pellegrini, when Leicester won the title three seasons ago. The Blue Moon has been rising since Pep Guardiola succeeded him, and there is little sign of it waning.

THE KOP FACTOR No disrespect, but where Jurgen Klopp brings heavy metal to the party at Liverpool, Watford are still bringing only tambourines and glockenspiels. To be fair though, the Hornets are making a big noise with what they’ve got.

THE EX FACTOR Even if they manage to keep the incredible run going against Manchester United after the international break, Watford’s next away game is a reunion at Fulham with Slavisa Jokanovic — the coach they jilted after he led them into the promised land three years ago. It could be their hardest game yet.