Watford’s Kiko Femenia tussles with Liverpool’s Roberto Firmino during their Premier League match at Vicarage Road Stadium on Saturday. (Reuters Photo)

WATFORD: Mohamed Salah set up Sadio Mane’s 100th Premier League goal and scored a brilliant goal of his own, while Roberto Firmino bagged a hat-trick as Liverpool reclaimed top spot with a 5-0 win over Watford in Claudio Ranieri’s first game in charge.