Doncaster have made forward Dany N'Guessan their sixth summer signing.
Tottenham have confirmed that Romanian defender Vlad Chiriches has completed a move to Napoli.
The 26-year-old has penned a three-year contract at the Parc des Sports after scoring 24 goals across two seasons with the Norwegian club.
He told Evian's official website: "I'm very happy. This is a great opportunity and a fresh start for me.
"I think this is the perfect place for me to play football and for my family to have a good life. I will give everything on the pitch, for my team-mates and for the club. I can't wait to get going."
Nielsen is a full Denmark international and scored his first goal for De Rod-Hvide against Malta in a World Cup qualifying match back in October.