Cyrillic names have all kinds of different spelling when written in Latin. Ultimately we should follow what's in the passport. I've seen it as Sergei, Serhei, Sergiy, Serhiy... the spelling often depends of which Latin writing language writes it down, for example 'Klitschko' is the German variant whereas in English it would be Klichko.
Who's Dzinziruk beaten? He's career has been wasted up to now. Williams, Cintron, Angulo, Martinez all have better resumes. Hell, Cotto's win over Foreman is better than anyone Dzinziruk has beaten. He's made a lot of defences but he has yet to beat a top fighter. Quality over quantity.
Easily number 1. His nearest rival is cotto. Then it's a toss up between bundrage, angulo, cintron and pacman
If you count Williams as a 154 guy then I'd rate him the top guy. Outside of Williams I think Dzinziruk is the next best fighter at 154. He's a style nightmare for Cotto and I take him over Angulo an d Cintron. I think Kirkland would be tough on Dzinziruk but he's not active at the moment. I also think Lara would be tough on him but he's still a fight or two from that. Dzinziruk is a good fighter with an excellent jab and good heigth, he's going to give Martinez a tough fight.
way way way off top 3 , best win against Santos , and I thought he lost against Konecny. A lot to prove.....