Hello guys, greetings from Latvia. It would be great, if Deniss joins your team, but I think we have to wait a little bit, because it takes time to fly from South Africa to Turkey and sign a contract.
Actually I don't know about your team's level, but as I see, Sivasspor is not a TOP team in Turkey, so Ivanovs has to be a really good player for you. The only problem could be that Ivanovs is maybe not ready yet, because the season in South Africa starts in 3 weeks, but I think it is so in Turkey as well.
Ivanovs is an experienced player, a stable starting 11 in Latvian national team (and not Lithuanian; I think you Turkish remember matches against LATVIA in Euro 2004 qualifier

). If he was a little bit taller, he would play in England (Championship) now, where he was on trial. And here you can see his defensive qualities and scored goal against Switzerland:
http://www.youtube.com/watch?v=mTpzg...eature=related
If you have any questions, just ask. I know Sivasspor wanted to buy Ivanos in the last winter, when Ertrugal was your coach. Ivanovs was his favorite player in Ajax Cape Town.