West Brom slipped deeper into relegation peril after Troy Deeney struck late to secure Watford a 1-0 win at Vicarage Road on Saturday.
The Hornets skipper marked his 300th league appearance for the club with a well-taken finish in the 77th minute that proved the difference in a tight affair.
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In addition to securing his side back-to-back league wins, Deeney's strike sent West Brom to a fifth successive Premier League defeat that will only heighten the pressure on the under-fire Alan Pardew, who was reportedly set to be sacked if he failed to claim three points.
The Baggies boss had been forced to smooth over a reported dressing room row with Chris Brunt in the lead-up and appeared set to at least claim a steadying, if uninspiring, point.
Salomon Rondon was the culprit for failing to earlier put the visitors ahead, directing a gilt-edged second-half header wide of the upright.
That proved their only real opportunity as they were left rooted to the bottom of the ladder and looking destined for the drop.