The winger played alongside Ronaldo for two years at Old Trafford and has been an international teammate of the five-time Ballon d'Or winner since 2006, helping Portugal to Euro 2016 and Nations League glory.
"One player who really surprised me and impressed me a lot in the beginning was Paul Scholes - he was phenomenal," Nani said during a Q&A with Football Wave.
"My favourite was still Cristiano Ronaldo - the best. Best player ever? I have seen so many... even from the past like Maradona, Pele... but I would pick my companion of many battles, someone I have won so much with, someone I really respect.
"Numbers don't lie and they also show he is the best - Cristiano Ronaldo."
Nani, now 33, currently plays for MLS side Orlando City. body check tags ::