Leicester extended its winless drought in the Premier League to five games.
Esteban Cambiasso's bizarre own goal gave West Brom a 1-0 win as Leicester City extended its winless Premier League run to five matches.
Nigel Pearson's men had been looking to avoid dropping points for a fifth match in succession, but Cambiasso's bizarre own goal gifted the visitors all three points in an unremarkable match Saturday.
Toothless Leicester struggled to make the most of its chances against Alan Irvine's men, with Jamie Vardy guilty of spurning a couple of very presentable opportunities.
And after a first half of few clear-cut chances, West Brom found the breakthrough early in the second period as Cambiasso inadvertently put a Wes Morgan clearance into his own net.
Andy King could have earned Leicester a draw in the final 15 minutes as he headed straight at Ben Foster.
But without top scorer Leonardo Ulloa, who only came on in the second half due to a slight injury, Leicester failed to bounce back from an underwhelming run and West Brom held on for its first win since the end of September.
Leicester showed few signs of overcoming its poor recent run early on, as the hosts struggled to provide service for their forwards.
And with Ulloa starting on the bench due to injury, their only real sight of goal in the opening stages saw Danny Drinkwater blaze a shot over from 20 yards.
West Brom — unchanged from its last Premier League outing against Crystal Palace — had to bide its time but after growing into the game it almost grabbed a 17th-minute lead, as the in-form Saido Berahino forced Kasper Schmeichel into a smart save with a shot from the edge of the area.
The hosts were convinced that they should have been awarded a penalty a few moments later, but Stuart Attwell — refereeing his first Premier League game since January 2012 — failed to spot Craig Dawson’s handball.
Leicester continued to press and could have taken the lead in the 37th minute, but Jamie Vardy's spectacular overhead kick was straight at goalkeeper Ben Foster.
West Brom almost capitalized when Chris Brunt slammed his effort over the crossbar following Berahino's clever cutback but was ahead two minutes after the break, courtesy of a helping hand from Cambiasso.
Berahino squeezed a low cross into the area and, although Wes Morgan had seemingly cleared the danger with a stooping header, the ball struck his Argentinian teammate and crept inside the post.
Leicester was lucky not to be dealt a further blow in the 66th minute as Marcin Wasilewski escaped punishment for catching Berahino in the face with his elbow, before King headed straight Foster with just under a quarter-hour to go.