Medvedev is looking forward to his first Auckland visit.
"It has been a great last few weeks," said Medvedev. "My game has really come together well and it is nice to be competing against players I looked up to for so long. To be here now alongside them and to break in to the top five for the first time is amazing."
"I've heard a lot about Auckland and I'm looking forward to playing there. I've got friends who've played there before and they talk about how much they enjoy it, so I'm excited to get there."
ASB Classic tournament director Karl Budge said:
"Daniil is in amazing form right now and only getting better. Not many players have got multiple wins over Novak let alone twice in one year. He's captured five titles already and I suspect this number is only going to grow. He's one of the highest ranked male players we've ever had come to Auckland."
The Auckland women's event has already confirmed fellow Serena Williams and Bianca Andreescu.
The ASB Classic is staged from 6-12 January (women's), followed by men's week (13-18 January).