Was Sukamuljo ever ranked world number 1 in men's doubles?
No
Yes
It is not known
He was always number 2
Answer
Yes, he was ranked world number 1 in men's doubles on 12 March 2019. He and his partner, Marcus Fernaldi Gideon, had won three consecutive Superseries Finals titles, and won the 2018 Asian Games men's doubles gold medal.
The Kevin Sanjaya Sukamuljo Phenomenon: How Well Do You Know the Indonesian Badminton Maestro?