"The 27-year-old has passed a medical and will wear the number four shirt but won't be eligible for tomorrow's clash with Everton," the club said on their website (www.wba.co.uk) on Friday.

Popov has 40 international caps.

"I've said many times over the past few weeks that we've been looking to bring in one more defender and I'm delighted we've managed to sign Goran," said West Brom manager Steve Clarke.

"Goran is a player the club have closely monitored for around three years so we know what we're getting. He has also given up the opportunity to play Champions League football with Dynamo Kiev to join Albion."