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The 1978 Bank of Oklahoma Grand Prix was a men's tennis tournament played on outdoor hard courts at the Shadow Mountain Racquet Club in Tulsa, Oklahoma in the United States that was part of the 1978 Colgate-Palmolive Grand Prix. It was the inaugural edition of the tournament was held from April 24 through April 30, 1978. Eddie Dibbs won the singles title and earned $8,500 first-prize money.