Dr. Sadiq Abubakar Abdullahi (born 5 February 1960) is a Nigerian born tennis player and executive director of Tennis Vision 2030. Abdullahi is an adjunct professor at Florida International University and Miami Dade College. He was a former professional tennis player from Nigeria, who represented his native country at the 1988 Summer Olympics in Seoul, where he was defeated in the first round by Spain's Javier Sánchez. The right-hander reached his highest singles Association of Tennis Professionals ranking on 14 October 1985, when he became the number 262 of the world.