Ronald "Ronnie" E. Holmberg (born January 27, 1938) is a former American tennis player who competed during the 1950s, 1960s and 1970s. He was ranked World No. 7 in 1960 and was ranked in the U.S. Top 10 for nine years. He is currently one of the 's select "Master Professionals" and devotes most of his time coaching, participating and directing charity events and clinics and other tennis related projects.