Albion somewhat surprisingly decided not to take up the year's option on his contract on Monday, allowing him leave on a free transfer.
The news has alerted a number of clubs across Europe, with the player's representative Zoran Krneta expecting no shortage of offers for the Slovenian this summer.
The likes of Stoke, Newcastle, Wolves, Fulham and Swansea are all thought to be tracking the skilful midfielder.
"In my opinion we will get at least 10 offers for Robert," Krneta told Nogomania. "There are a lot of interested clubs and I can reveal, that in the first two hours after the news was published on West Bromwich Albion's website, I got calls from four clubs.
"We will talk about his future today, but I repeat, we won't have any problems with finding him a new club and also a good club.
"I'm sure about it as he is a really good and respected footballer.
"He is the one who will choose his club, but I guess he will look for a good contract and also team, where he will be able to play every week."
Krneta admitted Koren would ideally like to stay in England as he searches for a new club.
"He is in his best years and he would like to stay in England, where everybody knows him and where he made his name," concluded Krneta.