The Toronto Indoor (also known as Toronto Molson Light Challenge from 1981-1985, Corel North American Indoor in 1986 and Skydome World Tennis in 1990) was a professional men's tennis tournament played on indoor carpet courts, held at the Maple Leaf Gardens. It was part of the Grand Prix tennis circuit and later, for one year, the ATP Championship Series of the ATP Tour. The tournament was established in 1971, becoming the second tournament held in Canada alongside the Canadian Open which alternated between Montreal, Quebec and Toronto, Ontario. The final event in 1990 was held at the Skydome.